/**
 * Main Seagull JavaScript library.
 *
 * @package seagull
 * @subpackage SGL
 */
var SGL = {
    isReady: false,
    ready: function(f) {
        // If the DOM is already ready
        if (SGL.isReady) {
            // Execute the function immediately
            if (typeof f == 'string') {
                eval(f);
            } else if (typeof f == 'function') {
                f.apply(document);
            }
        // Otherwise add the function to the wait list
        } else {
            SGL.onReadyDomEvents.push(f);
        }
    },
    returnValue: true,
    onSubmitEvents: [],
    onSubmit: function() {
        if (SGL.onSubmitEvents) {
            SGL.returnValue = true;
            for (var i = 0, j = SGL.onSubmitEvents.length; i < j; i++) {
                if (typeof SGL.onSubmitEvents[i] == 'string') {
                    eval(SGL.onSubmitEvents[i]);
                    if (!SGL.returnValue) {
                        return false;
                    }
                } else if (typeof SGL.onSubmitEvents[i] == 'function') {
                    if (!SGL.onSubmitEvents[i].apply(document)) {
                        return false;
                    }
                }
            }
        }
        return true;
    },
    onReadyDomEvents: [],
    onReadyDom: function() {
        // make sure that the DOM is not already loaded
        if (!SGL.isReady) {
            // Flag the DOM as ready
            SGL.isReady = true;

            if (SGL.onReadyDomEvents) {
                for (var i = 0, j = SGL.onReadyDomEvents.length; i < j; i++) {
                    if (typeof SGL.onReadyDomEvents[i] == 'string') {
                        eval(SGL.onReadyDomEvents[i]);
                    } else if (typeof SGL.onReadyDomEvents[i] == 'function') {
                        SGL.onReadyDomEvents[i].apply(document);
                    }
                }
                // Reset the list of functions
                SGL.onReadyDomEvents = null;
            }
        }
    }
};

var Publisher = {
     // loads content into modal
     do_getModalContent: function(module, action, article_id, modalWidth, modalHeight)
     {
        // setup modal options
        var option = {
            type: 'ajax',
            url: makeUrl({module: module, action: action, article_id: article_id}),
            modalWidth: modalWidth,
            modalHeight: modalHeight,
            showNow: true,
            overlayCloseOnClick: true
        };
        prepareModal(option);
     }
}

/**
 *  Cross-browser onDomReady solution
 *  Dean Edwards/Matthias Miller/John Resig
 */
new function() {
    /* for Mozilla/Opera9 */
    if (document.addEventListener) {
        document.addEventListener("DOMContentLoaded", SGL.onReadyDom, false);
    }

    /* for Internet Explorer */
    /*@cc_on @*/
    /*@if (@_win32)
        document.write("<script id=__ie_onload defer src=//:><\/script>");
        var script = document.getElementById("__ie_onload");
        script.onreadystatechange = function() {
            if (this.readyState == "complete") {
                SGL.onReadyDom(); // call the onload handler
            }
        };
    /*@end @*/

    /* for Safari */
    if (/WebKit/i.test(navigator.userAgent)) { // sniff
        SGL.webkitTimer = setInterval(function() {
            if (/loaded|complete/.test(document.readyState)) {
                // Remove the timer
                clearInterval(SGL.webkitTimer);
                SGL.webkitTimer = null;
                // call the onload handler
                SGL.onReadyDom();
                SGL.onSubmit();
            }
        }, 10);
    }

    /* for other browsers */
    oldWindowOnload = window.onload || null;
    window.onload = function() {
        if (oldWindowOnload) {
            oldWindowOnload();
        }
        SGL.onReadyDom();
    }
}

// ----------
// --- BC ---
// ----------

/**
 * Used for async load of sourcefourge bloody button,
 */
function async_load()
{
    var node;
    try {
        // variable _asyncDom is set from JavaScript in the iframe
        // node = top._asyncDom.cloneNode(true); // kills Safari 1.2.4
        node = top._asyncDom;
        // try to remove the first script element, the one that
        // executed all document.writes().
        node.removeChild(node.getElementsByTagName('script')[0]);
    } catch (e) {}
    try {
        // insert DOM fragment at a DIV with id "async_demo" on current page
        document.getElementById('async_demo').appendChild(node);
    } catch (e) {
        try {
            // fallback for some non DOM compliant browsers
            document.getElementById('async_demo').innerHTML = node.innerHTML;
        } catch (e2) {};
    }
}

/**
 * Make Seagull SEF URL.
 *
 * @param object params
 *
 * @return string
 */
function makeUrl(params)
{
    var ret = SGL_JS_FRONT_CONTROLLER != ''
        ? SGL_JS_WEBROOT + '/' + SGL_JS_FRONT_CONTROLLER
        : SGL_JS_WEBROOT;
    var moduleName = params.module ? params.module : '';
    var managerName = params.manager ? params.manager : moduleName;

    switch (SGL_JS_URL_STRATEGY) {

    // make classic URL
    case 'SGL_UrlParser_ClassicStrategy':
        if (ret.charAt(ret.length - 1) != '?') {
            ret = ret + '?';
        }
        ret = ret + 'moduleName=' + escape(moduleName) + '&managerName=' + escape(managerName);
        for (x in params) {
            if (x == 'module' || x == 'manager') {
                continue;
            }
            // add param
            ret = '&' + ret + escape(x) + '=' + escape(params[x]);
        }
        break;

    // make default Seagull SEF URL
    default:
        ret = ret + '/' + escape(moduleName) + '/' + escape(managerName) + '/';
        for (x in params) {
            if (x == 'module' || x == 'manager') {
                continue;
            }
            ret = ret + escape(x) + '/' + escape(params[x]) + '/';
        }
        break;
    }
    return ret;
}

SGL.ready(function() {
    var msg = document.getElementById('broadcastMessage');
    if (msg) {
        msg.getElementsByTagName('a')[0].onclick = function() {
            msg.style.display = 'none';
        }
    }
});


//  Allows to highlight a row when hovering it with mouse
//  Needs every row to have a "back..." class name
function switchRowColorOnHover()
{
    var table = document.getElementsByTagName("table");
    for (var i=0; i<table.length; i++) {
        var row = table[i].getElementsByTagName("tr");
        for (var j=0; j<row.length; j++) {
            row[j].onmouseover=function() {
                if (this.className.search(new RegExp("back"))>=0) {
                    this.className+=" backHighlight";
                }

            }
            row[j].onmouseout=function() {
                this.className=this.className.replace(new RegExp(" backHighlight\\b"), "");
            }
        }
    }
}

/**
 * Simple handler functions for:
 * - info/warning/error messages
 * - errors
 * - debug calls
 * @author Fortunato Geelhoed <fortunato@ifactory.com.au>
 */

function displayMessage(message, targetId)
{
    targetId = (targetId != undefined) ? targetId : 'ajaxMessage';

    $(targetId).update(message);
    $(targetId).show();
}

function displayDebug(debug, targetId)
{
    targetId = (targetId != undefined) ? targetId : 'ajaxDebug';
    var ti = $(targetId);

    if (!ti) {
        return;
    }

    if (debug) {
        ti.update(debug);
        ti.show();
    } else {
        ti.update('');
        ti.hide();
    }
}

function reportError(error, message)
{
    if (error) {
        $('ajaxMessage').update(message);
        //$('ajaxMessage').update(error);
        $('ajaxMessage').show();
    }
}

var SGL_JS_MESSAGE_INFO = 'info';
var SGL_JS_MESSAGE_WARNING = 'warning';
var SGL_JS_MESSAGE_ERROR = 'error';

function raiseJsMessage(msg, messageType, targetId)
{
    targetId = (targetId != undefined) ? targetId : 'ajaxMessage';
    if (msg == '') return false;
    var defName = '';
    var htmlOutput = '';
    switch (messageType) {
        case SGL_JS_MESSAGE_ERROR:      defName = 'error';     break;
        case SGL_JS_MESSAGE_WARNING:    defName = 'warning';   break;
        default:                        defName = 'info';
    }

    htmlOutput += '<div class="message-wrapper"><div class="message-top">&nbsp;</div><div class="message-content">';
    htmlOutput += '<p class="message-'+defName+'">'+msg+'</p>';
    htmlOutput += '</div><div class="message-bottom">&nbsp;</div></div>';

    $(targetId).update(htmlOutput);
    $(targetId).show();

    return true;
}
function clearRaisedMsg(targetId)
{
    targetId = (targetId != undefined) ? targetId : 'ajaxMessage';
    $(targetId).update();
    $(targetId).hide();
}


/**
 * Wrap content for a modal window
 * @todo Provide the option "params.hasTitle" for chat window?
 */
function wrapModal(params)
{
    params.modalWidth  = (params.modalWidth != undefined) ? params.modalWidth : 400;
    params.modalHeight = (params.modalHeight != undefined) ? params.modalHeight : 400;
    params.overflow    = (params.overflow != undefined) ? params.overflow : 'scroll';
    params.modalClose  = (params.modalClose != undefined) ? params.modalClose : false;

    var headerHeight     = 30;
    var innerHeight      = params.modalHeight - headerHeight;
    var correctionHeight = innerHeight - 18; // to get rid of bottom scroll bar

    sHeader = '<div class="modal-header-wrapper" style="width:' + params.modalWidth + 'px; overflow:hidden;">';

    if (params.modalClose != false) sHeader += '<a href="javascript:void(0);" onclick="'+params.modalClose+';" id="modal-close">&nbsp;</a>';

    sHeader += '<h1 style="height:' + headerHeight + 'px;">' + params.title + '</h1>'
            + '</div>'
            + '<div class="modal-wrapper" style="height:' + correctionHeight + 'px; width:' + params.modalWidth + 'px; overflow: hidden;">'
            + '<div class="modal-inner-wrapper" style="height: ' + innerHeight + 'px; width:' + params.modalWidth + 'px;'
            + ' overflow: ' + params.overflow + ';">';

    sFooter = '</div></div>';

    return sHeader + params.content + sFooter;
}
/*

Create a node for modal window.


- Usage 1:

var option = {
    type: 'ajax',
    modalWidth: 600,
    modalHeight: 600,
    modalName: 'hoge', // You need to set the id of an element that can assign onClick event like checkbox.
    url: makeUrl({module: "wchat", action: "testSetup", hoge: 'hoge', huga: 'huga'}),
    parameters: $('frmSkeleton').serialize(true)
};
prepareModal(option);



- Usage 2 (Ommiting several options):

var option = {
    type: 'ajax',
    modalName: 'hoge', // You need to set the id of an element that can assign onClick event like checkbox.
    url: makeUrl({module: "wchat", action: "testSetup", hoge: 'hoge', huga: 'huga'}),
};
prepareModal(option);



- Usage 3 (Not using Ajax):

var option = {
    type: 'normal',
    modalName: 'hoge', // You need to set the id of an element that can assign onClick event like checkbox.
    title: 'This is title',
    content: 'This is content.'
};
prepareModal(option);


- Usage 4 (Dispaly dynamically):

var option = {
    type: 'normal',
    title: 'This is title',
    content: 'This is content.',
    showNow: true                  // Just add this line.
};
prepareModal(option);


- Usage 5 (Dispaly dynamically with Ajax):

var option = {
    type: 'ajax',
    url: makeUrl({module: "wchat", action: 'showConfirmation', chat_id: chatId, type: type}),
    showNow: true
};
prepareModal(option);


- Usage 6 (Dispaly one having input area - We need to set the option "hasInput" for Firefox):

var option = {
    type: 'ajax',
    url: makeUrl({module: "wchat", action: 'showConfirmation', chat_id: chatId, type: type}),
    hasInput: true,
    showNow: true
};
prepareModal(option);


- Usage 7 (The one unabled to close by clicking overylay area - In this case we need to provide something to execute Control.Modal.close()):

var option = {
    type: 'ajax',
    url: makeUrl({module: "wchat", action: 'showConfirmation', chat_id: chatId, type: type}),
    overlayCloseOnClick: false,
    showNow: true
};
prepareModal(option);


*/
var modalHash = 0;
function getHash() {
//    var minutes = 1000*60;
//    var hours = minutes*60;
//    var days = hours*24;
//    var years = days*365;
//    var d = new Date();
//    var t = d.getTime();
//    modalHash = t / years;
    modalHash++;
    return modalHash;
}
function prepareModal(option)
{
    option.modalName           = (option.modalName != undefined) ? option.modalName : 'dummy';
    option.modalWidth          = (option.modalWidth != undefined) ? option.modalWidth : 400;
    option.modalHeight         = (option.modalHeight != undefined) ? option.modalHeight : 400;
    option.parameters          = (option.parameters != undefined) ? option.parameters : '';
    option.overflow            = (option.overflow != undefined) ? option.overflow : 'scroll';
    option.hasInput            = (option.hasInput != undefined) ? option.hasInput : false;
    option.overlayCloseOnClick = (option.overlayCloseOnClick != undefined) ? option.overlayCloseOnClick : true;
    option.modalClose          = (option.modalClose != undefined) ? option.modalClose : 'Control.Modal.close()';

    switch (option.type) {
        case 'ajax':

            var modalWindow = new Control.Modal(option.modalName,{
                containerClassName: 'window',
                width: option.modalWidth,
                height: option.modalHeight - 12, // silly correction
                overlayCloseOnClick: option.overlayCloseOnClick,
                contents: function() {
                    new Ajax.Request( option.url, {
                        method: 'get', asynchronous: true,
                        parameters: option.parameters,
                        onSuccess: function(transport) {
                            var json = transport.responseText.evalJSON();
                            if (json.error) {
                                reportError(json.error);
                                displayDebug(json.debug);
                            } else {
                                if (json.data['hash'] != undefined) {
                                    if (json.data['hash'] != modalHash) {
                                        // alert('Modal window has been closed and then opened for something else');
                                        return;
                                    }else{
                                        // alert('Hash is same');
                                    }
                                }else{
                                    // alert('Hash is undefined');
                                }

                                var params = option;

                                /**
                                 * Remember to return $aData['title'] and $aData['content'] at AjaxProvider class.
                                 */
                                params.title   = json.data['title'];
                                params.content = json.data['content'];

                                if (json.debug != undefined) {
                                    params.content = '<div id="modal-debug">'+ json.debug + '</div>' + params.content;
                                }
                                if (json.message != undefined) {
                                    params.content = '<div id="modal-message">'+ json.message + '</div>' + params.content;
                                }

                                // write content to modal window
                                $('modal_container').update(wrapModal(params));

                                if (typeof sIFR == "function") {
                                    sIFR.replaceElement(named({sSelector:"#modal_container h1.sifr",
                                           sFlashSrc: SGL_JS_WEBROOT +"/themes/wendells_au/sifr/dax_regular.swf",
                                           sColor:"#FFFFFF",
                                           sLinkColor:"#FFFFFF",
                                           //sBgColor:"#333333",
                                           sHoverColor:"#CCCCCC",
                                           nPaddingTop:0,
                                           nPaddingBottom:0,
                                           sWmode: "transparent",
                                           sFlashVars:"textalign=left&offsetTop=0"}));
                                }
                                Buttons.init('modal_container');
                                /* Fix up ugly IE7 select monsters */
                                if (navigator.userAgent.indexOf('MSIE 7.0') != -1) PsuedoSelector.init('modal_container');
                                // Firefox needs this to enable to have a cursor on form in modal window,
                                // http://livepipe.net/community/control_suite/181
                                if (option.hasInput) {
                                    $('modal_overlay').style.position = 'absolute';
                                }else{
                                    if (navigator.userAgent.indexOf('MSIE 6') != -1) {
                                        // ie6 freezes when position is changed to fixed :: ie6 behaves as required without change
                                    } else {
                                        $('modal_overlay').style.position = 'fixed';    
                                    }
                                }
                            }
                        }
                    });
                    return '&nbsp;'; // a nice animated gif maybe?
                }
            });

            break;

        case 'normal':
        default:

            var params = option;

            var modalWindow = new Control.Modal(option.modalName,{
                containerClassName: 'window',
                width: option.modalWidth,
                height: option.modalHeight - 12, // silly correction
                contents: wrapModal(params)
            });
    }

    if (option.showNow) {
        modalWindow.open();
    }
}

/**
 * Accordion Menu Manager
 */
var accordionMgr = function()
{
    this.preloadAccordion = function (containerId)
    {
        var verticalAccordions = $$('#' + containerId + ' .accordion_toggle');
        verticalAccordions.each(function(accordion) {
//            $(accordion.next(0)).setStyle({ height: '0px' }); // This does not work properly through Ajax!
//            $(accordion.next(0)).style.display = 'none'; // This works through Ajax.
            $(accordion.next(0)).hide(); // And this works through Ajax as well.
        });
    }
    this.loadAccordions = function (containerId)
    {
        var bottomAccordion = new accordion(containerId, {
            resizeSpeed : 18, // The speed of the accordion
            // The classnames to look for
            classNames : {
                toggle : 'accordion_toggle', // The standard class for the title bar
                toggleActive : 'accordion_toggle_active', // The class used for the active state of the title bar
                content : 'accordion_content' // The class used to find the content
            },
            defaultSize : { height : null, width : null}, // If you don't want the accordion to stretch to fit, its content, set a value here, handy for horixontal examples.
            direction : 'horizontal', // The direction of the accordion
            onEvent : 'click' // Should the accordion activate on click or say on mouseover? (apple.com)
        });

        // Open first one
        bottomAccordion.activate($$('#' + containerId + ' .accordion_toggle')[0]);
    }
    this.showAccordions = function(containerId)
    {
        containerId = (containerId != undefined) ? containerId : 'vertical_container';
        accordionMgr.preloadAccordion(containerId);
        accordionMgr.loadAccordions(containerId);
    }
}
accordionMgr = new accordionMgr();

/**
 * Javascript hash for chat window
 */
var notificationChatInterval = 30; // 30 sec.
//var notificationChatInterval = 20; // 20 sec.
//var notificationChatInterval = 15; // 15 sec.
//var notificationChatInterval = 10; // 10 sec.
//var notificationChatInterval = 5; // 5 sec.
var notificationChatDecay = 1;

var notificationChatAjax;

var ajaxNotificationChatMgr = function()
{
    this.do_restartFetchNotification = function()
    {
        notificationChatAjax.stop();
        notificationChatAjax.start();
        if (ajaxNotificationMgr != undefined) {
            ajaxNotificationMgr.do_restartFetchNotification();
        }
    }
    this.do_discardNotification = function(notificationId, status)
    {
        status = (status != undefined) ? status : '';
        new Ajax.Request( makeUrl({module: "wnotification", action: "discardNotification", 'notificationId': notificationId, 'status': status}), {
             method: 'get',
             asynchronous: true,
             onSuccess: function(transport) {
                 var json = transport.responseText.evalJSON();
                 if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                 } else {
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    ajaxNotificationChatMgr.do_restartFetchNotification();
                 }
            },
             onFailure: function(transport) {
                 // @todo do decent error handling?
                 // alert('An error ocurred while trying to update the notification.');
                ajaxNotificationChatMgr.do_restartFetchNotification();
             }
        });
        return false;
    }
    this.do_fetchNotification = function()
    {
        notificationChatAjax = new Ajax.PeriodicalUpdater('', makeUrl({module: 'wnotification', action: 'fetchNotification', target: 'chat', matchId: chatMatchId}), {
            method: 'get',
            asynchronous: true,
            frequency: notificationChatInterval,
            decay: notificationChatDecay,
            onSuccess: function(transport) {

                var json = transport.responseText.evalJSON();

                if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                } else {
                    displayDebug(json.debug);
                    // displayMessage(json.message);
                    $('wChatContent-notification-bar').update(json.data['list']);
                    //alert(json.data['list'].length)
                    if (json.data['list'].length <= 1) {
                        $('wChatContent-notification-bar').hide();
                    } else {
                        $('wChatContent-notification-bar').setStyle({
                            display: 'block'
                        });
                    }
                }
            },
            onFailure: function(transport) {
                // @todo do decent error handling?
                // alert('An error ocurred while trying to update the notification.');
            }
        });
    }
}

/**
 * Display Chat Window
 */
var chatNotificationId = 0;
var chatMatchId = 0;

function displayChatWindow(matchId, sendNotification, notificationId) {
    chatMatchId = matchId;
    sendNotification = (sendNotification != undefined) ? sendNotification : 0;
    notificationId = (notificationId != undefined) ? notificationId : 0;
    var option = {
        type: 'ajax',
        url: makeUrl({module: "wchat", action: 'displayChatWindow', match_id: matchId, send_notification: sendNotification, notification_id: notificationId, hash: getHash()}),
        overflow: 'hidden',
        modalWidth: 749,
        modalHeight: 520, // 507,
        hasInput: true,
        overlayCloseOnClick: false,
        modalClose: 'closeChatWindow()',
        showNow: true
    };
    prepareModal(option);
/*
    I cannot start notification for chat window here
    because the one user just discarded is displayed.
    Now it is started at ajax_chat.html
*/
//    if (notificationChatAjax == undefined) {
//        ajaxNotificationChatMgr = new ajaxNotificationChatMgr();
//        ajaxNotificationChatMgr.do_fetchNotification();
//    }else{
//        notificationChatAjax.start();
//    }
    return false;
}
function declineDirectChat(notificationId, matchId) {
    new Ajax.Request( makeUrl({module: "wchat", action: "declineDirectChat", notificationId: notificationId, match_id: matchId}), {
             method: 'get',
             asynchronous: true,
             onSuccess: function(transport) {
                 var json = transport.responseText.evalJSON();
                 if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                 } else {
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    ajaxNotificationChatMgr.do_restartFetchNotification();
                 }
            },
             onFailure: function(transport) {
                 // @todo do decent error handling?
                 //alert('An error ocurred while trying to update the notification.');
                ajaxNotificationChatMgr.do_restartFetchNotification();
             }
        });
    ajaxNotificationMgr.do_discardNotification(notificationId, 'declined');
}
function discardDeclineNotification(notificationId) {
    // discard notification
    ajaxNotificationMgr.do_discardNotification(notificationId);
    // close chat window
    chatMatchId = 0;
    chatNotificationId = 0;
    Control.Modal.close();
    notificationChatAjax.stop();
}
function chatCancel(notificationID, matchid, chatid)
{
    if (chatid) {
        // This is an indirect chat - need to change status
        new Ajax.Request( makeUrl({module: "wchat", action: "updateChat", notificationId: notificationID, match_id: matchid, chat_id: chatid, type: 'cancel'}), {
            method: 'get',
            asynchronous: true,
            onSuccess: function(transport) {
                var json = transport.responseText.evalJSON();
                if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                } else {
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    ajaxNotificationChatMgr.do_restartFetchNotification();
                }
            },
            onFailure: function(transport) {
                // @todo do decent error handling?
                //alert('An error ocurred while trying to update the notification.');
                ajaxNotificationChatMgr.do_restartFetchNotification();
            }
        });
    }
    
    if (chatMatchId > 0) {
        ajaxNotificationChatMgr.do_discardNotification(notificationID, 'cancelled');
    } else {
        ajaxNotificationMgr.do_discardNotification(notificationID);
    }
    message = '';
    ajaxNotificationMgr.do_sendNotification(notificationID, 'chat_cancelled', matchid, message);
}
function chatRaincheck(notificationID, matchid, chatid)
{
    if (chatid) {
        // This is an indirect chat - need to change status
        new Ajax.Request( makeUrl({module: "wchat", action: "updateChat", notificationId: notificationID, match_id: matchid, chat_id: chatid,  type: 'raincheck'}), {
            method: 'get',
            asynchronous: true,
            onSuccess: function(transport) {
                var json = transport.responseText.evalJSON();
                if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                } else {
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    ajaxNotificationChatMgr.do_restartFetchNotification();
                }
            },
            onFailure: function(transport) {
                // @todo do decent error handling?
                //alert('An error ocurred while trying to update the notification.');
                ajaxNotificationChatMgr.do_restartFetchNotification();
            }
        });
    }
    
    if (chatMatchId > 0) {
        ajaxNotificationChatMgr.do_discardNotification(notificationID, 'raincheck');
    } else {
        ajaxNotificationMgr.do_discardNotification(notificationID);
    }
    message = '';
    ajaxNotificationMgr.do_sendNotification(notificationID, 'chat_raincheck', matchid, message);
}
function closeChatWindow() {
    chatMatchId = 0;
    chatNotificationId = 0;
    Control.Modal.close();
    ajaxNotificationChatMgr.do_discardNotification(chatNotificationId, 'cancelled');
    notificationChatAjax.stop();
    return false;
}
/**
 * Display something on modal window
 */
function updateModalWindow(id, message) {
    var tObj = $(id);
    if (tObj != undefined) {
        // @todo Add some tags and use CSS?
        tObj.update(message);
    }
    return false;
}


/**
 * Fixes png transparency issues for "the-shade"
 * @see http://www.twinhelix.com/css/iepngfix/
 */
function ieMeasure() {
    // ie stuff only
    if (document.all && document.styleSheets && document.styleSheets[0] && document.styleSheets[0].addRule) {
        document.styleSheets[0].addRule('#the-shade-top', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)'); // Feel free to add rules for specific tags only, you just have to call it several times.
        document.styleSheets[0].addRule('#the-shade-center', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)'); // Feel free to add rules for specific tags only, you just have to call it several times.
        document.styleSheets[0].addRule('#the-shade-bottom', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)'); // Feel free to add rules for specific tags only, you just have to call it several times.
        //document.styleSheets[0].addRule('li', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)'); // Feel free to add rules for specific tags only, you just have to call it several times.
        document.styleSheets[0].addRule('#local-start', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)');
        document.styleSheets[0].addRule('#credibility-badge', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)');
        if ($('sign-up-here-img')) document.styleSheets[0].addRule('#sign-up-here-img', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)');
        if ($('continue-signup-img')) document.styleSheets[0].addRule('#continue-signup-img', 'behavior: url('+SGL_JS_WEBROOT+'/themes/wendells_au/css/iepngfix.htc)');
    }

    // and general stretch hocus pocus
    if (SGL_JS_SHADE == true && $('local')) {
        if ($('local').getHeight() < 770) {
            $('local').setStyle({height: '770px'});
        }

        //alert($('the-shade-center').getHeight());
        var pngStretch = $('local-inner').getHeight() - (424 + 322);
        //$('the-shade-center').relativize();
        //alert($('the-shade-center').visible())
        if (navigator.userAgent.indexOf('MSIE') != -1) {
           setTimeout($('the-shade-center').setStyle, 500, "{height: "+(pngStretch-28)+"'px'}");
        }  else {
           $('the-shade-center').setStyle({height: (pngStretch-28)+'px'});
        }
        $('the-shade').setStyle({display: 'inline'});
    }

    // for IE6 we need to resize the outer space div and make sure it happens
    // automagically when the enclosing wrapper-inner div resizes
    if (navigator.userAgent.indexOf('MSIE') != -1) {
        resizeOuterSpace();
        $('wrapper-inner').onresize = resizeOuterSpace;
    }
}

var _outerInitialHeight = 0;

function resizeOuterSpace()
{
    var os = $('outer-space');
    var wi = $('footer');

    if (os && wi) {
        if (!_outerInitialHeight) {
            _outerInitialHeight = os.getHeight();
        }

        var wih = wi.cumulativeOffset().top + 2; // offset of footer
        var size = 0;
        var tc;

        if (wih > _outerInitialHeight) {
            tc = os;
            size = wih;
        } else {
            tc = $('main');
            size = _outerInitialHeight - tc.cumulativeOffset().top;
        }

        tc.setStyle({height: size+'px'});
    }
}


/**
 * Replaces IE7 select elements with a text field untill they receive focus
 *
 * @author Fortunato Geelhoed <fortunato@ifactory.com.au>
 * @since 0.0.1
 * @copyright IFactory PTY LTD http://www.ifactory.com.au
 */
var PsuedoSelector = {

    init : function(container)
    {
        var target = '#'+container+' ';
        if (container == undefined) target = '';
        //alert(target);
        var selectors = $$(target + 'select');
        selectors.each(function(sel) {
            // replace with text field

            if (sel.options[sel.selectedIndex].innerHTML != '') sValue = sel.options[sel.selectedIndex].innerHTML; //sValue = sel.getValue();
            else sValue = 'Select ...';

            /*
            var elX = new Element("input", {
                                        'type': 'hidden',
                                        'name': 'psuedo-hidden-'+sel.identify(),
                                        'value': sel.getValue(),
                                        'readonly': 'readonly'
                                        });
            sel.insert({before : elX});
            */

            var elX = new Element("input", {
                                        'type': 'text',
                                        'name': 'psuedo-'+sel.identify(),
                                        'id': 'psuedo-'+sel.identify(),
                                        'value': sValue,
                                        'class': 'psuedo-selector',
                                        'readonly': 'readonly'
                                        });

            // add the newly created element to the list
            sel.insert({before : elX});
            sel.hide();

            if (sel.getWidth() > 0) sel.previousSiblings()[0].setStyle({'width': sel.getWidth() + 17});

            Event.observe(sel.previousSiblings()[0], 'mouseover', function(event) {
              var element = Event.element(event);
              PsuedoSelector.activate(element);
            });
            Event.observe(sel.previousSiblings()[0], 'focus', function(event) {
              var element = Event.element(event);
              PsuedoSelector.activate(element);
            });
            Event.observe(sel, 'blur', function(event) {
              var element = Event.element(event);
              PsuedoSelector.deActivate(element);
            });
            Event.observe(sel, 'change', function(event) {
              var element = Event.element(event);
              //sel.previousSiblings()[1].value = sel.value;
              sel.previousSiblings()[0].value = sel.options[sel.selectedIndex].innerHTML;
              //PsuedoSelector.deActivate(element);
            });
            // connect labels to psuedo construction
            labels = $$('label[for]');
            labels.each(function(lbl) {
                Event.observe(lbl, 'click', function() {
                    // grab contents of the for attribute
                    attr = lbl.readAttribute('for');
                    // and use it to identify the select element
                    if ($(attr) && $(attr).readAttribute('type') == 'select-one') {
                        PsuedoSelector.activate($(attr).previousSiblings()[0]);
                    }
                });
            });
        });
    },
    activate : function(element)
    {
        element.nextSiblings()[0].show();
        element.nextSiblings()[0].focus();
        element.hide();
    },
    deActivate : function(sel)
    {
        sel.previousSiblings()[0].show();
        sel.hide();
    }
}

/**
 * Replaces standard checkboxes and radio buttons with pretty psuedo controls
 */
var Manipulator = {

    init: function(container)
    {
        if (container == null) container = 'wrapper-inner';
        var chkrs = $(container).getElementsBySelector('input[type="checkbox"]', 'input[type="radio"]');
        chkrs.each(function(chk) {
            // hide input
            //chk.setStyle({display:'none'});
            chk.setStyle({opacity:0, position: 'absolute', 'top':'-1000px', 'left':'-1000px'});
            //chk.hide();
            //alert(chk.readAttribute('onclick'));

            //alert(chk.readAttribute('disabled'));

            //alert(isDisabled);

            // insert div before input (so it becomes prevSibling)
            var className = 'checker';
            if (chk.readAttribute('type') != 'checkbox') className = 'radio-checker'
            if (chk.checked == true) {
                if (chk.readAttribute('type') == 'checkbox') className += ' checked';
                else className += ' radio-checked';
            }

            // check if input element should be disabled
            var isDisabled = false;
            if (chk.readAttribute('disabled') != undefined) isDisabled = true;
            // if so, add className
            if (isDisabled) className += "-disabled"

            var elX = new Element("a", {
                                        'class': className,
                                        //'href': 'javascript:void(0);',
                                        'id': 'psuedo-'+chk.identify(),
                                        'title': chk.readAttribute('title')
                                        }).update('&nbsp;');

//            if (chk.readAttribute('onclick')) {
//                //alert(chk.readAttribute('onclick'));
//                elX.writeAttribute('onclick', chk.readAttribute('onclick')+'; return true;');
//            }
            // add the newly created element to the list
            chk.insert({before : elX});

//            if (navigator.userAgent.indexOf('MSIE') != -1) {
//                Event.observe($('psuedo-'+chk.identify()), 'click', function() {
//                    var executor = chk.getAttribute('onclick', 2);
//                    if (executor) executor();
//                });
//            } else {
//                Event.observe($('psuedo-'+chk.identify()), 'click', function() {
//                    eval(chk.readAttribute('onclick'));
//                }, true);
//            }
            // now setup the events
            Manipulator.setupEvents(chk);

        });
        // Observe click events on label elements
        // fetch all labels with a for attribute
        labels = $$('label[for]');
        labels.each(function(lbl) {
            attr = lbl.readAttribute('for');
            if ($(attr) && ($(attr).readAttribute('type') == 'checkbox' || $(attr).readAttribute('type') == 'radio')) {
                Event.observe(lbl, 'click', function(event) {
                    // grab contents of the for attribute
                    attr = lbl.readAttribute('for');
                    // and use it to identify the checker element
                    if ($(attr)) {
                        if ($(attr).readAttribute('type') == 'checkbox') {
                                var isDisabled = false;
                                if ($(attr).readAttribute('disabled') != undefined) isDisabled = true;
                             if (!isDisabled) {
                                 if ($(attr).checked) Manipulator.deSelect($(attr), true);
                                 else Manipulator.select($(attr), true);
                             }
                            // execute the onclick attribute
                            Manipulator.execOnclick($(attr));
                        } else if($(attr).readAttribute('type') == 'radio') {
                            if (!$(attr).checked) {
                                // start by deselecting any currently selected elements in the radio group
                                var radios = $$('input[name="'+$(attr).readAttribute('name')+'"]');
                                radios.each(function(rad) {
                                    Manipulator.deSelect(rad, true);
                                });
                                Manipulator.select($(attr), true);
                            }
                            // execute the onclick attribute
                            Manipulator.execOnclick($(attr));
                        }
                    }
                    Event.stop(event);
                });
            }
        });
        // attach reset events to forms so that manipulator is re-initiated
        forms = $$('form');
        forms.each(function(frm) {
            Event.observe(frm, 'reset', function() {
                // re-manipulate
                setTimeout('Manipulator.reset()', 10);
            });
        });
    },
    execOnclick: function(elem)
    {
        if (navigator.userAgent.indexOf('MSIE') != -1) {
            var executor = elem.getAttribute('onclick', 2);
            if (executor) executor();
        } else {
            eval(elem.readAttribute('onclick'));
        }
    },
    setupEvents: function(chk)
    {
        // observe a click on a manipulated checbox or radio button control (the a element)
        Event.observe(chk.previousSiblings()[0], 'click', function(event) {

            /*
            if (navigator.userAgent.indexOf('MSIE') != -1) {
                var executor = chk.getAttribute('onclick', 2);
                if (executor) executor();
            } else {
                eval(chk.readAttribute('onclick'));
            }
            */
            if (chk.readAttribute('type') == 'checkbox') {
                var isDisabled = false;
                if (chk.readAttribute('disabled') != undefined) isDisabled = true;
                if (!isDisabled) {
                     if (chk.checked) Manipulator.deSelect(chk, true);
                     else Manipulator.select(chk, true);
                }
            }
            if (chk.readAttribute('type') == 'radio') {
                if (!chk.checked) {
                    // start by deselecting any currently selected elements in the radio group
                    var radios = $$('input[name="'+chk.readAttribute('name')+'"]');
                    radios.each(function(rad) {
                        Manipulator.deSelect(rad, true);
                    });
                    Manipulator.select(chk, true);
                }
            }

            Manipulator.execOnclick(chk);
        });
    },
    select: function(chk, apply)
    {
        if (apply) chk.checked = true;
        if (chk.readAttribute('type') == 'checkbox') {
            chk.previousSiblings()[0].addClassName('checked');
        } else {
            chk.previousSiblings()[0].addClassName('radio-checked');
        }
    },
    deSelect: function(chk, apply)
    {
        if (apply) chk.checked = false;
        if (chk.readAttribute('type') == 'checkbox') chk.previousSiblings()[0].removeClassName('checked');
        else chk.previousSiblings()[0].removeClassName('radio-checked');
    },
    reset : function()
    {
        // remove any manipulator form controls
        /**
         * @todo reset elements in a more generic fashion where a smaller sectin of the page is targetted when searching for input fields
         * @todo if it is called twice javascript gives us an error "chk.previousSiblings()[0] has no properties"
         */
        var chkrs = $('content').getElementsBySelector('input[type="checkbox"]', 'input[type="radio"]');
        chkrs.each(function(chk) {
            chk.previousSiblings()[0].remove();
        });
        // re-manipulate
        setTimeout('Manipulator.init()', 10);
    },
    enable : function()
    {
         alert('@todo');
    },
    disable : function()
    {
         alert('@todo');
    }
}


/**
 * Beautifies buttons and mimics look'nfeel across browsers
 */
var Buttons = {

    init : function(container)
    {
        // extend prototypes Form.Element.methods.enable() & disable() functions
        Object.extend(Form.Element.Methods, {
            enable: function(element) {
                element = $(element);
                element.disabled = false;
                element.removeClassName('disabled');
                element.ancestors()[0].removeClassName('disabled');
                return element;
            },
            disable: function(element) {
                element = $(element);
                element.disabled = true;
                element.addClassName('disabled');
                element.ancestors()[0].addClassName('disabled');
                return element;
            }
        });
        Element.addMethods();

        if (container == null) container = '#wrapper-inner';
        else container = '#'+container;
        //alert('!!');
        var btns = $$(container+' input[type="button"]', container+' input[type="submit"]', container+' input[type="reset"]', container+' a[class="button"]');
        btns.each(function(btn) {

            if (navigator.userAgent.indexOf('MSIE 7.0') != -1) btn.setStyle({width: (btn.getWidth()+22)+'px'});

            var divWidth = (btn.getWidth()+1+37); // 37 == paddingLeft + paddingRight
            /* IE fixes (what did you expect?!) */
            if (navigator.userAgent.indexOf('MSIE 7.0') != -1) {
                var divWidth = (divWidth-37);
            } else if (navigator.userAgent.indexOf('MSIE 6.0') != -1) {
                divWidth = btn.getWidth()+22;
                btn.setStyle({width: (btn.getWidth()+21)+'px'});
            }
            // wrap it
            var div = new Element('div', { 'class': btn.className, 'style' : 'width: '+divWidth+'px;'});
            btn.wrap(div);

            // mark disabled btns as disabled
            if (btn.disabled) {
                btn.addClassName('disabled');
                btn.ancestors()[0].addClassName('disabled');
            }

            /* IE6 hover state simulation */
            if (navigator.userAgent.indexOf('MSIE 6.0') != -1) {
                Event.observe(div, 'mouseover', function(event) {
                    var btn = div.childElements()[0];
                    if (btn.disabled) {
                        div.addClassName('sfHover-'+btn.className+'-disabled');
                    } else {
                        div.addClassName('sfHover-'+btn.className);
                    }
                });
                Event.observe(div, 'mouseout', function(event) {
                    var btn = div.childElements()[0];
                    if (btn.disabled) {
                        div.removeClassName('sfHover-'+btn.className+'-disabled');
                    } else {
                        div.removeClassName('sfHover-'+btn.className);
                    }
                });
            }
        });
    }
}

var QuotaMgr = {
    hash: 0, // Firefox 3 needs this not to let it use cache
    refresh: function(id) {
        QuotaMgr.hash++;
        id = (id != undefined) ? id : 'qbar-wrapper';
        new Ajax.Request( makeUrl({module: "wmessages", action: "refreshQuota", hash: QuotaMgr.hash}), {
             method: 'get',
             asynchronous: true,
             onSuccess: function(transport) {
                 var json = transport.responseText.evalJSON();
                 if (json.error) {
                    // Comment out this for test use, otherwise you overwrite the message.
                    // reportError(json.error);
                    // displayDebug(json.debug);
                 } else {
                    // Comment out this for test use, otherwise you overwrite the message.
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    if ($(id).innerHTML) {
                        // displayMessage(json.data['quota']);
                        $(id).update(json.data['quota']);
                    }
                 }
            },
             onFailure: function(transport) {
                 // @todo do decent error handling?
             }
        });
        return false;
    }
}

/**
 * Online status at client side.
 *
 * Currently this framework does not contain online status of users not having their tooltip on the page
 * because we do not need them at the moment.
 * 
 * Added (2008.08.05): I made the logic that generates tooltip with this class at client side like modal window
 *                     and decided not to implement it to avoid creating a possiblity
 *                     that the new logic affects other logic using this class.
 * 
 *                     If you need the logic, please ask me. It is in my PC. We need to change this file
 *                     and "SGL_Output::displayUsername" to make it work.
 *
 *
 * [Phase 1]
 * "SGL_Output::displayUsername" set the following variables.
 *
 *     onlineStatus.myUserId (This variable is used at "My Home" page if the current page is "My Home" page)
 *     onlineStatus.status (This variable is set through the method "onlineStatus.update")
 *
 * [Phase 2]
 * "SGL_Output::displayUsername" and other programs set the following variable. Some logic add directly.
 * Others use "onlineStatus.addEventIfNotExists".
 *
 *     onlineStatus.onChangeEvents (This looks like a method name but it is an array)
 *
 * [Phase 3]
 * When "ajaxNotificationMgr.do_fetchNotification" (defined in wnotifications.js) is executed,
 * it updates "onlineStatus.status" through the method "onlineStatus.batchUpdate"
 * and then executes the logic stored in "onlineStatus.onChangeEvents"
 * through the method "onlineStatus.refreshOnlineStatus".
 *
 * So if we need user online status without notification bar, create the following logic.
 *
 *    1. Create a code that executes js script refreshing the appearance regarding to online status
 *       when the page is loaded by setting the code into "onlineStatus.onChangeEvents".
 *       Please refer "SGL_Output::displayUsername" or search files with "onlineStatus.onChangeEvents".
 *
 *    2. Create a js logic that does the following.
 *       Please refer "ajaxNotificationMgr.do_fetchNotification".
 *
 *       2-1. Gets online status with AJAX.
 *       2-2. Store online status by calling "onlineStatus.batchUpdate".
 *       2-3. Refresh the appearance by calling "onlineStatus.refreshOnlineStatus".
 *            When "onlineStatus.refreshOnlineStatus" is executed the code you set at step 1 is executed.
 */
var onlineStatus = {
    myUserId: null,
    onChangeEvents: [],
    modal: null,
    addEventIfNotExists: function(ev) {
        for (var i = 0; i < onlineStatus.onChangeEvents.length; i++) {
            if (onlineStatus.onChangeEvents[i] == ev) {
                return true;
            }
        }
        onlineStatus.onChangeEvents.push(ev);
    },
    refreshOnlineStatus: function() {
        // var ddd = onlineStatus.onChangeEvents.length + '<br />';
        // for (var i = 0; i < onlineStatus.onChangeEvents.length; i++) {
        //     ddd += onlineStatus.onChangeEvents[i] + '<br />';
        // }
        for (var i = 0; i < onlineStatus.onChangeEvents.length; i++) {
            eval(onlineStatus.onChangeEvents[i]);
        }
    },
    status: [],
    idxStatus: [],
    uStatus: function() {
        userId = '',
        status = 0,
        changed = false
    },
    isOnline: function(uid) {
        if (onlineStatus.idxStatus[uid] == undefined) {
            return false;
        }else{
            var t = onlineStatus.idxStatus[uid];
            return onlineStatus.status[t].status;
        }
    },
    isChanged: function(uid) {
        if (onlineStatus.idxStatus[uid] == undefined) {
            return false;
        }else{
            var t = onlineStatus.idxStatus[uid];
            return onlineStatus.status[t].changed;
        }
    },
    getUserList: function() {
        var tmpList = [];
        for (var i = 0; i < onlineStatus.status.length; i++) {
            tmpList[i] = onlineStatus.status[i].userId;
        }
        return tmpList.join();
    },
//
// I just comment out here to avoid the confusion of use
// because we probablly do not need this method.
//
//    reset: function() {
//        // Reset online status list
//        onlineStatus.status    = [];
//        onlineStatus.idxStatus = [];
//    },
    add: function(uid, status) {
        // Set only if it is not set
        if (onlineStatus.idxStatus[uid] == undefined) {
            var tmpStatus = new onlineStatus.uStatus();
            tmpStatus.userId = uid;
            tmpStatus.status = (status == 1);
            onlineStatus.status.push(tmpStatus);
            onlineStatus.idxStatus[uid] = onlineStatus.status.length - 1;
        }
    },
    update: function(uid, status) {
        if (onlineStatus.idxStatus[uid] == undefined) {
            onlineStatus.add(uid, status);
        }else{
            var t = onlineStatus.idxStatus[uid];
            onlineStatus.status[t].changed = (onlineStatus.status[t].status != status);
            onlineStatus.status[t].status = (status == 1);
        }
    },
//
// I just comment out here to avoid the confusion of use
// because we can just call onlineStatus.batchUpdate.
//
//    batchAdd: function(arrData) {
//        onlineStatus.reset();
//        for (var i = 0; i < arrData.length; i++) {
//            onlineStatus.add(arrData[i]['usr_id'], arrData[i]['status']);
//        }
//    },
    batchUpdate: function(arrData) {
        for (var i = 0; i < arrData.length; i++) {
            onlineStatus.update(arrData[i]['usr_id'], arrData[i]['status']);
        }
    },
    //
    // This is called by mouseover event on A tags for user tooltip ("SGL_Output::displayUsername").
    // Interesting thing is that I thought the mouseover event would have been overwritten
    // after Control.Modal is executed, but it does not seem so.
    //
    // Anyway, although this implementation is not good because of the unknown behavior,
    // I finally successed to change the online status dynamically.
    //
    showTooltip: function(uid, id) {
        onlineStatus.modal = new Control.Modal(id, {
            position: 'mouse',
            offsetTop: 20,
            offsetLeft: 25,
            contents: $('tooltip-' + uid).innerHTML,
            afterOpen: function() {
                $('modal_container').update($('tooltip-' + uid).innerHTML)
            }
        });
        onlineStatus.modal.open();
    },
    hideTooltip: function() {
        onlineStatus.modal.close();
    },
    refreshTooltip: function(uid) {
        if ($('online-status-' + uid) != undefined) {
            $('online-status-' + uid).innerHTML = onlineStatus.isOnline(uid) ? '<div class="online">Online</div>' : '<div class="offline">Offline</div>';
        }
    }
}


/*  Prototype JavaScript framework, version 1.6.0.2
 *  (c) 2005-2008 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.6.0.2',

  Browser: {
    IE:     !!(window.attachEvent && !window.opera),
    Opera:  !!window.opera,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
  },

  BrowserFeatures: {
    XPath: !!document.evaluate,
    ElementExtensions: !!window.HTMLElement,
    SpecificElementExtensions:
      document.createElement('div').__proto__ &&
      document.createElement('div').__proto__ !==
        document.createElement('form').__proto__
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },
  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;


/* Based on Alex Arnell's inheritance implementation. */
var Class = {
  create: function() {
    var parent = null, properties = $A(arguments);
    if (Object.isFunction(properties[0]))
      parent = properties.shift();

    function klass() {
      this.initialize.apply(this, arguments);
    }

    Object.extend(klass, Class.Methods);
    klass.superclass = parent;
    klass.subclasses = [];

    if (parent) {
      var subclass = function() { };
      subclass.prototype = parent.prototype;
      klass.prototype = new subclass;
      parent.subclasses.push(klass);
    }

    for (var i = 0; i < properties.length; i++)
      klass.addMethods(properties[i]);

    if (!klass.prototype.initialize)
      klass.prototype.initialize = Prototype.emptyFunction;

    klass.prototype.constructor = klass;

    return klass;
  }
};

Class.Methods = {
  addMethods: function(source) {
    var ancestor   = this.superclass && this.superclass.prototype;
    var properties = Object.keys(source);

    if (!Object.keys({ toString: true }).length)
      properties.push("toString", "valueOf");

    for (var i = 0, length = properties.length; i < length; i++) {
      var property = properties[i], value = source[property];
      if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
        var method = value, value = Object.extend((function(m) {
          return function() { return ancestor[m].apply(this, arguments) };
        })(property).wrap(method), {
          valueOf:  function() { return method },
          toString: function() { return method.toString() }
        });
      }
      this.prototype[property] = value;
    }

    return this;
  }
};

var Abstract = { };

Object.extend = function(destination, source) {
  for (var property in source)
    destination[property] = source[property];
  return destination;
};

Object.extend(Object, {
  inspect: function(object) {
    try {
      if (Object.isUndefined(object)) return 'undefined';
      if (object === null) return 'null';
      return object.inspect ? object.inspect() : String(object);
    } catch (e) {
      if (e instanceof RangeError) return '...';
      throw e;
    }
  },

  toJSON: function(object) {
    var type = typeof object;
    switch (type) {
      case 'undefined':
      case 'function':
      case 'unknown': return;
      case 'boolean': return object.toString();
    }

    if (object === null) return 'null';
    if (object.toJSON) return object.toJSON();
    if (Object.isElement(object)) return;

    var results = [];
    for (var property in object) {
      var value = Object.toJSON(object[property]);
      if (!Object.isUndefined(value))
        results.push(property.toJSON() + ': ' + value);
    }

    return '{' + results.join(', ') + '}';
  },

  toQueryString: function(object) {
    return $H(object).toQueryString();
  },

  toHTML: function(object) {
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
  },

  keys: function(object) {
    var keys = [];
    for (var property in object)
      keys.push(property);
    return keys;
  },

  values: function(object) {
    var values = [];
    for (var property in object)
      values.push(object[property]);
    return values;
  },

  clone: function(object) {
    return Object.extend({ }, object);
  },

  isElement: function(object) {
    return object && object.nodeType == 1;
  },

  isArray: function(object) {
    return object != null && typeof object == "object" &&
      'splice' in object && 'join' in object;
  },

  isHash: function(object) {
    return object instanceof Hash;
  },

  isFunction: function(object) {
    return typeof object == "function";
  },

  isString: function(object) {
    return typeof object == "string";
  },

  isNumber: function(object) {
    return typeof object == "number";
  },

  isUndefined: function(object) {
    return typeof object == "undefined";
  }
});

Object.extend(Function.prototype, {
  argumentNames: function() {
    var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
    return names.length == 1 && !names[0] ? [] : names;
  },

  bind: function() {
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
    var __method = this, args = $A(arguments), object = args.shift();
    return function() {
      if (typeof $A === 'function') // Added Firefox Fix
        return __method.apply(object, args.concat($A(arguments)));
    }
  },

  bindAsEventListener: function() {
    var __method = this, args = $A(arguments), object = args.shift();
    return function(event) {
      if (typeof $A === 'function') // Added Firefox Fix
        return __method.apply(object, [event || window.event].concat(args));
    }
  },

  curry: function() {
    if (!arguments.length) return this;
    var __method = this, args = $A(arguments);
    return function() {
      return __method.apply(this, args.concat($A(arguments)));
    }
  },

  delay: function() {
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
    return window.setTimeout(function() {
      return __method.apply(__method, args);
    }, timeout);
  },

  wrap: function(wrapper) {
    var __method = this;
    return function() {
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
    }
  },

  methodize: function() {
    if (this._methodized) return this._methodized;
    var __method = this;
    return this._methodized = function() {
      return __method.apply(null, [this].concat($A(arguments)));
    };
  }
});

Function.prototype.defer = Function.prototype.delay.curry(0.01);

Date.prototype.toJSON = function() {
  return '"' + this.getUTCFullYear() + '-' +
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
    this.getUTCDate().toPaddedString(2) + 'T' +
    this.getUTCHours().toPaddedString(2) + ':' +
    this.getUTCMinutes().toPaddedString(2) + ':' +
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
};

var Try = {
  these: function() {
    var returnValue;

    for (var i = 0, length = arguments.length; i < length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) { }
    }

    return returnValue;
  }
};

RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};

/*--------------------------------------------------------------------------*/

var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;

    this.registerCallback();
  },

  registerCallback: function() {
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
    this.callback(this);
  },

  stop: function() {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = null;
  },

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.execute();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
});
Object.extend(String, {
  interpret: function(value) {
    return value == null ? '' : String(value);
  },
  specialChar: {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '\\': '\\\\'
  }
});

Object.extend(String.prototype, {
  gsub: function(pattern, replacement) {
    var result = '', source = this, match;
    replacement = arguments.callee.prepareReplacement(replacement);

    while (source.length > 0) {
      if (match = source.match(pattern)) {
        result += source.slice(0, match.index);
        result += String.interpret(replacement(match));
        source  = source.slice(match.index + match[0].length);
      } else {
        result += source, source = '';
      }
    }
    return result;
  },

  sub: function(pattern, replacement, count) {
    replacement = this.gsub.prepareReplacement(replacement);
    count = Object.isUndefined(count) ? 1 : count;

    return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
    });
  },

  scan: function(pattern, iterator) {
    this.gsub(pattern, iterator);
    return String(this);
  },

  truncate: function(length, truncation) {
    length = length || 30;
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
    return this.length > length ?
      this.slice(0, length - truncation.length) + truncation : String(this);
  },

  strip: function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
  },

  stripTags: function() {
    return this.replace(/<\/?[^>]+>/gi, '');
  },

  stripScripts: function() {
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  },

  extractScripts: function() {
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
    return (this.match(matchAll) || []).map(function(scriptTag) {
      return (scriptTag.match(matchOne) || ['', ''])[1];
    });
  },

  evalScripts: function() {
    return this.extractScripts().map(function(script) { return eval(script) });
  },

  escapeHTML: function() {
    var self = arguments.callee;
    self.text.data = this;
    return self.div.innerHTML;
  },

  unescapeHTML: function() {
    var div = new Element('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
  },

  toQueryParams: function(separator) {
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
    if (!match) return { };

    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
      if ((pair = pair.split('='))[0]) {
        var key = decodeURIComponent(pair.shift());
        var value = pair.length > 1 ? pair.join('=') : pair[0];
        if (value != undefined) value = decodeURIComponent(value);

        if (key in hash) {
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
          hash[key].push(value);
        }
        else hash[key] = value;
      }
      return hash;
    });
  },

  toArray: function() {
    return this.split('');
  },

  succ: function() {
    return this.slice(0, this.length - 1) +
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  },

  times: function(count) {
    return count < 1 ? '' : new Array(count + 1).join(this);
  },

  camelize: function() {
    var parts = this.split('-'), len = parts.length;
    if (len == 1) return parts[0];

    var camelized = this.charAt(0) == '-'
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
      : parts[0];

    for (var i = 1; i < len; i++)
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

    return camelized;
  },

  capitalize: function() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  },

  underscore: function() {
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
  },

  dasherize: function() {
    return this.gsub(/_/,'-');
  },

  inspect: function(useDoubleQuotes) {
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
      var character = String.specialChar[match[0]];
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
    });
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  },

  toJSON: function() {
    return this.inspect(true);
  },

  unfilterJSON: function(filter) {
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
  },

  isJSON: function() {
    var str = this;
    if (str.blank()) return false;
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  },

  evalJSON: function(sanitize) {
    var json = this.unfilterJSON();
    try {
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
    } catch (e) { }
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  },

  include: function(pattern) {
    return this.indexOf(pattern) > -1;
  },

  startsWith: function(pattern) {
    return this.indexOf(pattern) === 0;
  },

  endsWith: function(pattern) {
    var d = this.length - pattern.length;
    return d >= 0 && this.lastIndexOf(pattern) === d;
  },

  empty: function() {
    return this == '';
  },

  blank: function() {
    return /^\s*$/.test(this);
  },

  interpolate: function(object, pattern) {
    return new Template(this, pattern).evaluate(object);
  }
});

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
  escapeHTML: function() {
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  },
  unescapeHTML: function() {
    return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
  }
});

String.prototype.gsub.prepareReplacement = function(replacement) {
  if (Object.isFunction(replacement)) return replacement;
  var template = new Template(replacement);
  return function(match) { return template.evaluate(match) };
};

String.prototype.parseQuery = String.prototype.toQueryParams;

Object.extend(String.prototype.escapeHTML, {
  div:  document.createElement('div'),
  text: document.createTextNode('')
});

with (String.prototype.escapeHTML) div.appendChild(text);

var Template = Class.create({
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    if (Object.isFunction(object.toTemplateReplacements))
      object = object.toTemplateReplacements();

    return this.template.gsub(this.pattern, function(match) {
      if (object == null) return '';

      var before = match[1] || '';
      if (before == '\\') return match[2];

      var ctx = object, expr = match[3];
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
      match = pattern.exec(expr);
      if (match == null) return before;

      while (match != null) {
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
        ctx = ctx[comp];
        if (null == ctx || '' == match[3]) break;
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
        match = pattern.exec(expr);
      }

      return before + String.interpret(ctx);
    });
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = {
  each: function(iterator, context) {
    var index = 0;
    iterator = iterator.bind(context);
    try {
      this._each(function(value) {
        iterator(value, index++);
      });
    } catch (e) {
      if (e != $break) throw e;
    }
    return this;
  },

  eachSlice: function(number, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var index = -number, slices = [], array = this.toArray();
    while ((index += number) < array.length)
      slices.push(array.slice(index, index+number));
    return slices.collect(iterator, context);
  },

  all: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = true;
    this.each(function(value, index) {
      result = result && !!iterator(value, index);
      if (!result) throw $break;
    });
    return result;
  },

  any: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = false;
    this.each(function(value, index) {
      if (result = !!iterator(value, index))
        throw $break;
    });
    return result;
  },

  collect: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];
    this.each(function(value, index) {
      results.push(iterator(value, index));
    });
    return results;
  },

  detect: function(iterator, context) {
    iterator = iterator.bind(context);
    var result;
    this.each(function(value, index) {
      if (iterator(value, index)) {
        result = value;
        throw $break;
      }
    });
    return result;
  },

  findAll: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (iterator(value, index))
        results.push(value);
    });
    return results;
  },

  grep: function(filter, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];

    if (Object.isString(filter))
      filter = new RegExp(filter);

    this.each(function(value, index) {
      if (filter.match(value))
        results.push(iterator(value, index));
    });
    return results;
  },

  include: function(object) {
    if (Object.isFunction(this.indexOf))
      if (this.indexOf(object) != -1) return true;

    var found = false;
    this.each(function(value) {
      if (value == object) {
        found = true;
        throw $break;
      }
    });
    return found;
  },

  inGroupsOf: function(number, fillWith) {
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
    return this.eachSlice(number, function(slice) {
      while(slice.length < number) slice.push(fillWith);
      return slice;
    });
  },

  inject: function(memo, iterator, context) {
    iterator = iterator.bind(context);
    this.each(function(value, index) {
      memo = iterator(memo, value, index);
    });
    return memo;
  },

  invoke: function(method) {
    var args = $A(arguments).slice(1);
    return this.map(function(value) {
      return value[method].apply(value, args);
    });
  },

  max: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == null || value >= result)
        result = value;
    });
    return result;
  },

  min: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == null || value < result)
        result = value;
    });
    return result;
  },

  partition: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var trues = [], falses = [];
    this.each(function(value, index) {
      (iterator(value, index) ?
        trues : falses).push(value);
    });
    return [trues, falses];
  },

  pluck: function(property) {
    var results = [];
    this.each(function(value) {
      results.push(value[property]);
    });
    return results;
  },

  reject: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (!iterator(value, index))
        results.push(value);
    });
    return results;
  },

  sortBy: function(iterator, context) {
    iterator = iterator.bind(context);
    return this.map(function(value, index) {
      return {value: value, criteria: iterator(value, index)};
    }).sort(function(left, right) {
      var a = left.criteria, b = right.criteria;
      return a < b ? -1 : a > b ? 1 : 0;
    }).pluck('value');
  },

  toArray: function() {
    return this.map();
  },

  zip: function() {
    var iterator = Prototype.K, args = $A(arguments);
    if (Object.isFunction(args.last()))
      iterator = args.pop();

    var collections = [this].concat(args).map($A);
    return this.map(function(value, index) {
      return iterator(collections.pluck(index));
    });
  },

  size: function() {
    return this.toArray().length;
  },

  inspect: function() {
    return '#<Enumerable:' + this.toArray().inspect() + '>';
  }
};

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  filter:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray,
  every:   Enumerable.all,
  some:    Enumerable.any
});
function $A(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) return iterable.toArray();
  var length = iterable.length || 0, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}

if (Prototype.Browser.WebKit) {
  $A = function(iterable) {
    if (!iterable) return [];
    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
        iterable.toArray) return iterable.toArray();
    var length = iterable.length || 0, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
  };
}

Array.from = $A;

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  },

  clear: function() {
    this.length = 0;
    return this;
  },

  first: function() {
    return this[0];
  },

  last: function() {
    return this[this.length - 1];
  },

  compact: function() {
    return this.select(function(value) {
      return value != null;
    });
  },

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(Object.isArray(value) ?
        value.flatten() : [value]);
    });
  },

  without: function() {
    var values = $A(arguments);
    return this.select(function(value) {
      return !values.include(value);
    });
  },

  reverse: function(inline) {
    return (inline !== false ? this : this.toArray())._reverse();
  },

  reduce: function() {
    return this.length > 1 ? this : this[0];
  },

  uniq: function(sorted) {
    return this.inject([], function(array, value, index) {
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
        array.push(value);
      return array;
    });
  },

  intersect: function(array) {
    return this.uniq().findAll(function(item) {
      return array.detect(function(value) { return item === value });
    });
  },

  clone: function() {
    return [].concat(this);
  },

  size: function() {
    return this.length;
  },

  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  },

  toJSON: function() {
    var results = [];
    this.each(function(object) {
      var value = Object.toJSON(object);
      if (!Object.isUndefined(value)) results.push(value);
    });
    return '[' + results.join(', ') + ']';
  }
});

// use native browser JS 1.6 implementation if available
if (Object.isFunction(Array.prototype.forEach))
  Array.prototype._each = Array.prototype.forEach;

if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
  i || (i = 0);
  var length = this.length;
  if (i < 0) i = length + i;
  for (; i < length; i++)
    if (this[i] === item) return i;
  return -1;
};

if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
  var n = this.slice(0, i).reverse().indexOf(item);
  return (n < 0) ? n : i - n - 1;
};

Array.prototype.toArray = Array.prototype.clone;

function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

if (Prototype.Browser.Opera){
  Array.prototype.concat = function() {
    var array = [];
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
    for (var i = 0, length = arguments.length; i < length; i++) {
      if (Object.isArray(arguments[i])) {
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
          array.push(arguments[i][j]);
      } else {
        array.push(arguments[i]);
      }
    }
    return array;
  };
}
Object.extend(Number.prototype, {
  toColorPart: function() {
    return this.toPaddedString(2, 16);
  },

  succ: function() {
    return this + 1;
  },

  times: function(iterator) {
    $R(0, this, true).each(iterator);
    return this;
  },

  toPaddedString: function(length, radix) {
    var string = this.toString(radix || 10);
    return '0'.times(length - string.length) + string;
  },

  toJSON: function() {
    return isFinite(this) ? this.toString() : 'null';
  }
});

$w('abs round ceil floor').each(function(method){
  Number.prototype[method] = Math[method].methodize();
});
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {

  function toQueryPair(key, value) {
    if (Object.isUndefined(value)) return key;
    return key + '=' + encodeURIComponent(String.interpret(value));
  }

  return {
    initialize: function(object) {
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
    },

    _each: function(iterator) {
      for (var key in this._object) {
        var value = this._object[key], pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    },

    set: function(key, value) {
      return this._object[key] = value;
    },

    get: function(key) {
      return this._object[key];
    },

    unset: function(key) {
      var value = this._object[key];
      delete this._object[key];
      return value;
    },

    toObject: function() {
      return Object.clone(this._object);
    },

    keys: function() {
      return this.pluck('key');
    },

    values: function() {
      return this.pluck('value');
    },

    index: function(value) {
      var match = this.detect(function(pair) {
        return pair.value === value;
      });
      return match && match.key;
    },

    merge: function(object) {
      return this.clone().update(object);
    },

    update: function(object) {
      return new Hash(object).inject(this, function(result, pair) {
        result.set(pair.key, pair.value);
        return result;
      });
    },

    toQueryString: function() {
      return this.map(function(pair) {
        var key = encodeURIComponent(pair.key), values = pair.value;

        if (values && typeof values == 'object') {
          if (Object.isArray(values))
            return values.map(toQueryPair.curry(key)).join('&');
        }
        return toQueryPair(key, values);
      }).join('&');
    },

    inspect: function() {
      return '#<Hash:{' + this.map(function(pair) {
        return pair.map(Object.inspect).join(': ');
      }).join(', ') + '}>';
    },

    toJSON: function() {
      return Object.toJSON(this.toObject());
    },

    clone: function() {
      return new Hash(this);
    }
  }
})());

Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
Hash.from = $H;
var ObjectRange = Class.create(Enumerable, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

  _each: function(iterator) {
    var value = this.start;
    while (this.include(value)) {
      iterator(value);
      value = value.succ();
    }
  },

  include: function(value) {
    if (value < this.start)
      return false;
    if (this.exclusive)
      return value < this.end;
    return value <= this.end;
  }
});

var $R = function(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
};

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};

Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});

Ajax.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();

    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
    else if (Object.isHash(this.options.parameters))
      this.options.parameters = this.options.parameters.toObject();
  }
});

Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = Ajax.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      // simulate other verbs over post
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      // when GET, append parameters to URL
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new Ajax.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      Ajax.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && this.isSameOrigin() && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  isSameOrigin: function() {
    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
      protocol: location.protocol,
      domain: document.domain,
      port: location.port ? ':' + location.port : ''
    }));
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name) || null;
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')) ||
        this.responseText.blank())
          return null;
    try {
      return this.responseText.evalJSON(options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});

Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = Object.clone(options);
    var onComplete = options.onComplete;
    options.onComplete = (function(response, json) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, json);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }
  }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
function $(element) {
  if (arguments.length > 1) {
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
      elements.push($(arguments[i]));
    return elements;
  }
  if (Object.isString(element))
    element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
    var results = [];
    var query = document.evaluate(expression, $(parentElement) || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    for (var i = 0, length = query.snapshotLength; i < length; i++)
      results.push(Element.extend(query.snapshotItem(i)));
    return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  // DOM level 2 ECMAScript Language Binding
  Object.extend(Node, {
    ELEMENT_NODE: 1,
    ATTRIBUTE_NODE: 2,
    TEXT_NODE: 3,
    CDATA_SECTION_NODE: 4,
    ENTITY_REFERENCE_NODE: 5,
    ENTITY_NODE: 6,
    PROCESSING_INSTRUCTION_NODE: 7,
    COMMENT_NODE: 8,
    DOCUMENT_NODE: 9,
    DOCUMENT_TYPE_NODE: 10,
    DOCUMENT_FRAGMENT_NODE: 11,
    NOTATION_NODE: 12
  });
}

(function() {
  var element = this.Element;
  this.Element = function(tagName, attributes) {
    attributes = attributes || { };
    tagName = tagName.toLowerCase();
    var cache = Element.cache;
    if (Prototype.Browser.IE && attributes.name) {
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
      delete attributes.name;
      return Element.writeAttribute(document.createElement(tagName), attributes);
    }
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
  };
  Object.extend(this.Element, element || { });
}).call(window);

Element.cache = { };

Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },

  toggle: function(element) {
    element = $(element);
    Element[Element.visible(element) ? 'hide' : 'show'](element);
    return element;
  },

  hide: function(element) {
    $(element).style.display = 'none';
    return element;
  },

  show: function(element) {
    $(element).style.display = '';
    return element;
  },

  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
    return element;
  },

  update: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);
    content = Object.toHTML(content);
    element.innerHTML = content.stripScripts();
    content.evalScripts.bind(content).defer();
    return element;
  },

  replace: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    else if (!Object.isElement(content)) {
      content = Object.toHTML(content);
      var range = element.ownerDocument.createRange();
      range.selectNode(element);
      content.evalScripts.bind(content).defer();
      content = range.createContextualFragment(content.stripScripts());
    }
    element.parentNode.replaceChild(content, element);
    return element;
  },

  insert: function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = {bottom:insertions};

    var content, insert, tagName, childNodes;

    for (var position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      insert = Element._insertionTranslations[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        insert(element, content);
        continue;
      }

      content = Object.toHTML(content);

      tagName = ((position == 'before' || position == 'after')
        ? element.parentNode : element).tagName.toUpperCase();

      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

      if (position == 'top' || position == 'after') childNodes.reverse();
      childNodes.each(insert.curry(element));

      content.evalScripts.bind(content).defer();
    }

    return element;
  },

  wrap: function(element, wrapper, attributes) {
    element = $(element);
    if (Object.isElement(wrapper))
      $(wrapper).writeAttribute(attributes || { });
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
    else wrapper = new Element('div', wrapper);
    if (element.parentNode)
      element.parentNode.replaceChild(wrapper, element);
    wrapper.appendChild(element);
    return wrapper;
  },

  inspect: function(element) {
    element = $(element);
    var result = '<' + element.tagName.toLowerCase();
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
      var property = pair.first(), attribute = pair.last();
      var value = (element[property] || '').toString();
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
    });
    return result + '>';
  },

  recursivelyCollect: function(element, property) {
    element = $(element);
    var elements = [];
    while (element = element[property])
      if (element.nodeType == 1)
        elements.push(Element.extend(element));
    return elements;
  },

  ancestors: function(element) {
    return $(element).recursivelyCollect('parentNode');
  },

  descendants: function(element) {
    return $(element).select("*");
  },

  firstDescendant: function(element) {
    element = $(element).firstChild;
    while (element && element.nodeType != 1) element = element.nextSibling;
    return $(element);
  },

  immediateDescendants: function(element) {
    if (!(element = $(element).firstChild)) return [];
    while (element && element.nodeType != 1) element = element.nextSibling;
    if (element) return [element].concat($(element).nextSiblings());
    return [];
  },

  previousSiblings: function(element) {
    return $(element).recursivelyCollect('previousSibling');
  },

  nextSiblings: function(element) {
    return $(element).recursivelyCollect('nextSibling');
  },

  siblings: function(element) {
    element = $(element);
    return element.previousSiblings().reverse().concat(element.nextSiblings());
  },

  match: function(element, selector) {
    if (Object.isString(selector))
      selector = new Selector(selector);
    return selector.match($(element));
  },

  up: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(element.parentNode);
    var ancestors = element.ancestors();
    return Object.isNumber(expression) ? ancestors[expression] :
      Selector.findElement(ancestors, expression, index);
  },

  down: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return element.firstDescendant();
    return Object.isNumber(expression) ? element.descendants()[expression] :
      element.select(expression)[index || 0];
  },

  previous: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
    var previousSiblings = element.previousSiblings();
    return Object.isNumber(expression) ? previousSiblings[expression] :
      Selector.findElement(previousSiblings, expression, index);
  },

  next: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
    var nextSiblings = element.nextSiblings();
    return Object.isNumber(expression) ? nextSiblings[expression] :
      Selector.findElement(nextSiblings, expression, index);
  },

  select: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element, args);
  },

  adjacent: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element.parentNode, args).without(element);
  },

  identify: function(element) {
    element = $(element);
    var id = element.readAttribute('id'), self = arguments.callee;
    if (id) return id;
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
    element.writeAttribute('id', id);
    return id;
  },

  readAttribute: function(element, name) {
    element = $(element);
    if (Prototype.Browser.IE) {
      var t = Element._attributeTranslations.read;
      if (t.values[name]) return t.values[name](element, name);
      if (t.names[name]) name = t.names[name];
      if (name.include(':')) {
        return (!element.attributes || !element.attributes[name]) ? null :
         element.attributes[name].value;
      }
    }
    return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
    element = $(element);
    var attributes = { }, t = Element._attributeTranslations.write;

    if (typeof name == 'object') attributes = name;
    else attributes[name] = Object.isUndefined(value) ? true : value;

    for (var attr in attributes) {
      name = t.names[attr] || attr;
      value = attributes[attr];
      if (t.values[attr]) name = t.values[attr](element, value);
      if (value === false || value === null)
        element.removeAttribute(name);
      else if (value === true)
        element.setAttribute(name, name);
      else element.setAttribute(name, value);
    }
    return element;
  },

  getHeight: function(element) {
    return $(element).getDimensions().height;
  },

  getWidth: function(element) {
    return $(element).getDimensions().width;
  },

  classNames: function(element) {
    return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    var elementClassName = element.className;
    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    if (!element.hasClassName(className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    element.className = element.className.replace(
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
    return element;
  },

  toggleClassName: function(element, className) {
    if (!(element = $(element))) return;
    return element[element.hasClassName(className) ?
      'removeClassName' : 'addClassName'](className);
  },

  // removes whitespace-only text node children
  cleanWhitespace: function(element) {
    element = $(element);
    var node = element.firstChild;
    while (node) {
      var nextNode = node.nextSibling;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        element.removeChild(node);
      node = nextNode;
    }
    return element;
  },

  empty: function(element) {
    return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);
    var originalAncestor = ancestor;

    if (element.compareDocumentPosition)
      return (element.compareDocumentPosition(ancestor) & 8) === 8;

    if (element.sourceIndex && !Prototype.Browser.Opera) {
      var e = element.sourceIndex, a = ancestor.sourceIndex,
       nextAncestor = ancestor.nextSibling;
      if (!nextAncestor) {
        do { ancestor = ancestor.parentNode; }
        while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
      }
      if (nextAncestor && nextAncestor.sourceIndex)
       return (e > a && e < nextAncestor.sourceIndex);
    }

    while (element = element.parentNode)
      if (element == originalAncestor) return true;
    return false;
  },

  scrollTo: function(element) {
    element = $(element);
    var pos = element.cumulativeOffset();
    window.scrollTo(pos[0], pos[1]);
    return element;
  },

  getStyle: function(element, style) {
    element = $(element);
    style = style == 'float' ? 'cssFloat' : style.camelize();
    var value = element.style[style];
    if (!value) {
      var css = document.defaultView.getComputedStyle(element, null);
      value = css ? css[style] : null;
    }
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
    return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
    return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
    element = $(element);
    var elementStyle = element.style, match;
    if (Object.isString(styles)) {
      element.style.cssText += ';' + styles;
      return styles.include('opacity') ?
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
    }
    for (var property in styles)
      if (property == 'opacity') element.setOpacity(styles[property]);
      else
        elementStyle[(property == 'float' || property == 'cssFloat') ?
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
            property] = styles[property];

    return element;
  },

  setOpacity: function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;
    return element;
  },

  getDimensions: function(element) {
    element = $(element);
    var display = $(element).getStyle('display');
    if (display != 'none' && display != null) // Safari bug
      return {width: element.offsetWidth, height: element.offsetHeight};

    // All *Width and *Height properties give 0 on elements with display none,
    // so enable the element temporarily
    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
  },

  makePositioned: function(element) {
    element = $(element);
    var pos = Element.getStyle(element, 'position');
    if (pos == 'static' || !pos) {
      element._madePositioned = true;
      element.style.position = 'relative';
      // Opera returns the offset relative to the positioning context, when an
      // element is position relative but top and left have not been defined
      if (window.opera) {
        element.style.top = 0;
        element.style.left = 0;
      }
    }
    return element;
  },

  undoPositioned: function(element) {
    element = $(element);
    if (element._madePositioned) {
      element._madePositioned = undefined;
      element.style.position =
        element.style.top =
        element.style.left =
        element.style.bottom =
        element.style.right = '';
    }
    return element;
  },

  makeClipping: function(element) {
    element = $(element);
    if (element._overflow) return element;
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
    if (element._overflow !== 'hidden')
      element.style.overflow = 'hidden';
    return element;
  },

  undoClipping: function(element) {
    element = $(element);
    if (!element._overflow) return element;
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
    element._overflow = null;
    return element;
  },

  cumulativeOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        if (element.tagName == 'BODY') break;
        var p = Element.getStyle(element, 'position');
        if (p !== 'static') break;
      }
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  absolutize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'absolute') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    var offsets = element.positionedOffset();
    var top     = offsets[1];
    var left    = offsets[0];
    var width   = element.clientWidth;
    var height  = element.clientHeight;

    element._originalLeft   = left - parseFloat(element.style.left  || 0);
    element._originalTop    = top  - parseFloat(element.style.top || 0);
    element._originalWidth  = element.style.width;
    element._originalHeight = element.style.height;

    element.style.position = 'absolute';
    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.width  = width + 'px';
    element.style.height = height + 'px';
    return element;
  },

  relativize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'relative') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    element.style.position = 'relative';
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.height = element._originalHeight;
    element.style.width  = element._originalWidth;
    return element;
  },

  cumulativeScrollOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  getOffsetParent: function(element) {
    if (element.offsetParent) return $(element.offsetParent);
    if (element == document.body) return $(element);

    while ((element = element.parentNode) && element != document.body)
      if (Element.getStyle(element, 'position') != 'static')
        return $(element);

    return $(document.body);
  },

  viewportOffset: function(forElement) {
    var valueT = 0, valueL = 0;

    var element = forElement;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;

      // Safari fix
      if (element.offsetParent == document.body &&
        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
        valueT -= element.scrollTop  || 0;
        valueL -= element.scrollLeft || 0;
      }
    } while (element = element.parentNode);

    return Element._returnOffset(valueL, valueT);
  },

  clonePosition: function(element, source) {
    var options = Object.extend({
      setLeft:    true,
      setTop:     true,
      setWidth:   true,
      setHeight:  true,
      offsetTop:  0,
      offsetLeft: 0
    }, arguments[2] || { });

    // find page position of source
    source = $(source);
    var p = source.viewportOffset();

    // find coordinate system to use
    element = $(element);
    var delta = [0, 0];
    var parent = null;
    // delta [0,0] will do fine with position: fixed elements,
    // position:absolute needs offsetParent deltas
    if (Element.getStyle(element, 'position') == 'absolute') {
      parent = element.getOffsetParent();
      delta = parent.viewportOffset();
    }

    // correct by body offsets (fixes Safari)
    if (parent == document.body) {
      delta[0] -= document.body.offsetLeft;
      delta[1] -= document.body.offsetTop;
    }

    // set position
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
    return element;
  }
};

Element.Methods.identify.counter = 1;

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,
  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
    names: {
      className: 'class',
      htmlFor:   'for'
    },
    values: { }
  }
};

if (Prototype.Browser.Opera) {
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
    function(proceed, element, style) {
      switch (style) {
        case 'left': case 'top': case 'right': case 'bottom':
          if (proceed(element, 'position') === 'static') return null;
        case 'height': case 'width':
          // returns '0px' for hidden elements; we want it to return null
          if (!Element.visible(element)) return null;

          // returns the border-box dimensions rather than the content-box
          // dimensions, so we subtract padding and borders from the value
          var dim = parseInt(proceed(element, style), 10);

          if (dim !== element['offset' + style.capitalize()])
            return dim + 'px';

          var properties;
          if (style === 'height') {
            properties = ['border-top-width', 'padding-top',
             'padding-bottom', 'border-bottom-width'];
          }
          else {
            properties = ['border-left-width', 'padding-left',
             'padding-right', 'border-right-width'];
          }
          return properties.inject(dim, function(memo, property) {
            var val = proceed(element, property);
            return val === null ? memo : memo - parseInt(val, 10);
          }) + 'px';
        default: return proceed(element, style);
      }
    }
  );

  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
    function(proceed, element, attribute) {
      if (attribute === 'title') return element.title;
      return proceed(element, attribute);
    }
  );
}

else if (Prototype.Browser.IE) {
  // IE doesn't report offsets correctly for static elements, so we change them
  // to "relative" to get the values, then change them back.
  Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
    function(proceed, element) {
      element = $(element);
      var position = element.getStyle('position');
      if (position !== 'static') return proceed(element);
      element.setStyle({ position: 'relative' });
      var value = proceed(element);
      element.setStyle({ position: position });
      return value;
    }
  );

  $w('positionedOffset viewportOffset').each(function(method) {
    Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element) {
        element = $(element);
        var position = element.getStyle('position');
        if (position !== 'static') return proceed(element);
        // Trigger hasLayout on the offset parent so that IE6 reports
        // accurate offsetTop and offsetLeft values for position: fixed.
        var offsetParent = element.getOffsetParent();
        if (offsetParent && offsetParent.getStyle('position') === 'fixed')
          offsetParent.setStyle({ zoom: 1 });
        element.setStyle({ position: 'relative' });
        var value = proceed(element);
        element.setStyle({ position: position });
        return value;
      }
    );
  });

  Element.Methods.getStyle = function(element, style) {
    element = $(element);
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
    var value = element.style[style];
    if (!value && element.currentStyle) value = element.currentStyle[style];

    if (style == 'opacity') {
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (value[1]) return parseFloat(value[1]) / 100;
      return 1.0;
    }

    if (value == 'auto') {
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
        return element['offset' + style.capitalize()] + 'px';
      return null;
    }
    return value;
  };

  Element.Methods.setOpacity = function(element, value) {
    function stripAlpha(filter){
      return filter.replace(/alpha\([^\)]*\)/gi,'');
    }
    element = $(element);
    var currentStyle = element.currentStyle;
    if ((currentStyle && !currentStyle.hasLayout) ||
      (!currentStyle && element.style.zoom == 'normal'))
        element.style.zoom = 1;

    var filter = element.getStyle('filter'), style = element.style;
    if (value == 1 || value === '') {
      (filter = stripAlpha(filter)) ?
        style.filter = filter : style.removeAttribute('filter');
      return element;
    } else if (value < 0.00001) value = 0;
    style.filter = stripAlpha(filter) +
      'alpha(opacity=' + (value * 100) + ')';
    return element;
  };

  Element._attributeTranslations = {
    read: {
      names: {
        'class': 'className',
        'for':   'htmlFor'
      },
      values: {
        _getAttr: function(element, attribute) {
          return element.getAttribute(attribute, 2);
        },
        _getAttrNode: function(element, attribute) {
          var node = element.getAttributeNode(attribute);
          return node ? node.value : "";
        },
        _getEv: function(element, attribute) {
          attribute = element.getAttribute(attribute);
          return attribute ? attribute.toString().slice(23, -2) : null;
        },
        _flag: function(element, attribute) {
          return $(element).hasAttribute(attribute) ? attribute : null;
        },
        style: function(element) {
          return element.style.cssText.toLowerCase();
        },
        title: function(element) {
          return element.title;
        }
      }
    }
  };

  Element._attributeTranslations.write = {
    names: Object.extend({
      cellpadding: 'cellPadding',
      cellspacing: 'cellSpacing'
    }, Element._attributeTranslations.read.names),
    values: {
      checked: function(element, value) {
        element.checked = !!value;
      },

      style: function(element, value) {
        element.style.cssText = value ? value : '';
      }
    }
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
      'encType maxLength readOnly longDesc').each(function(attr) {
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
    Object.extend(v, {
      href:        v._getAttr,
      src:         v._getAttr,
      type:        v._getAttr,
      action:      v._getAttrNode,
      disabled:    v._flag,
      checked:     v._flag,
      readonly:    v._flag,
      multiple:    v._flag,
      onload:      v._getEv,
      onunload:    v._getEv,
      onclick:     v._getEv,
      ondblclick:  v._getEv,
      onmousedown: v._getEv,
      onmouseup:   v._getEv,
      onmouseover: v._getEv,
      onmousemove: v._getEv,
      onmouseout:  v._getEv,
      onfocus:     v._getEv,
      onblur:      v._getEv,
      onkeypress:  v._getEv,
      onkeydown:   v._getEv,
      onkeyup:     v._getEv,
      onsubmit:    v._getEv,
      onreset:     v._getEv,
      onselect:    v._getEv,
      onchange:    v._getEv
    });
  })(Element._attributeTranslations.read.values);
}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1) ? 0.999999 :
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
    return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;

    if (value == 1)
      if(element.tagName == 'IMG' && element.width) {
        element.width++; element.width--;
      } else try {
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
      } catch (e) { }

    return element;
  };

  // Safari returns margins on body which is incorrect if the child is absolutely
  // positioned.  For performance reasons, redefine Element#cumulativeOffset for
  // KHTML/WebKit only.
  Element.Methods.cumulativeOffset = function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      if (element.offsetParent == document.body)
        if (Element.getStyle(element, 'position') == 'absolute') break;

      element = element.offsetParent;
    } while (element);

    return Element._returnOffset(valueL, valueT);
  };
}

if (Prototype.Browser.IE || Prototype.Browser.Opera) {
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
  Element.Methods.update = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);

    content = Object.toHTML(content);
    var tagName = element.tagName.toUpperCase();

    if (tagName in Element._insertionTranslations.tags) {
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
    }
    else element.innerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

if ('outerHTML' in document.createElement('div')) {
  Element.Methods.replace = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) {
      element.parentNode.replaceChild(content, element);
      return element;
    }

    content = Object.toHTML(content);
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

    if (Element._insertionTranslations.tags[tagName]) {
      var nextSibling = element.next();
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
      parent.removeChild(element);
      if (nextSibling)
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
      else
        fragments.each(function(node) { parent.appendChild(node) });
    }
    else element.outerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
  if (t) {
    div.innerHTML = t[0] + html + t[1];
    t[2].times(function() { div = div.firstChild });
  } else div.innerHTML = html;
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: function(element, node) {
    element.parentNode.insertBefore(node, element);
  },
  top: function(element, node) {
    element.insertBefore(node, element.firstChild);
  },
  bottom: function(element, node) {
    element.appendChild(node);
  },
  after: function(element, node) {
    element.parentNode.insertBefore(node, element.nextSibling);
  },
  tags: {
    TABLE:  ['<table>',                '</table>',                   1],
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
    SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  Object.extend(this.tags, {
    THEAD: this.tags.TBODY,
    TFOOT: this.tags.TBODY,
    TH:    this.tags.TD
  });
}).call(Element._insertionTranslations);

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
    attribute = Element._attributeTranslations.has[attribute] || attribute;
    var node = $(element).getAttributeNode(attribute);
    return node && node.specified;
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

if (!Prototype.BrowserFeatures.ElementExtensions &&
    document.createElement('div').__proto__) {
  window.HTMLElement = { };
  window.HTMLElement.prototype = document.createElement('div').__proto__;
  Prototype.BrowserFeatures.ElementExtensions = true;
}

Element.extend = (function() {
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
    return Prototype.K;

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
    if (!element || element._extendedByPrototype ||
        element.nodeType != 1 || element == window) return element;

    var methods = Object.clone(Methods),
      tagName = element.tagName, property, value;

    // extend methods for specific tags
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

    for (property in methods) {
      value = methods[property];
      if (Object.isFunction(value) && !(property in element))
        element[property] = value.methodize();
    }

    element._extendedByPrototype = Prototype.emptyFunction;
    return element;

  }, {
    refresh: function() {
      // extend methods for all tags (Safari doesn't need this)
      if (!Prototype.BrowserFeatures.ElementExtensions) {
        Object.extend(Methods, Element.Methods);
        Object.extend(Methods, Element.Methods.Simulated);
      }
    }
  });

  extend.refresh();
  return extend;
})();

Element.hasAttribute = function(element, attribute) {
  if (element.hasAttribute) return element.hasAttribute(attribute);
  return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
    Object.extend(Form, Form.Methods);
    Object.extend(Form.Element, Form.Element.Methods);
    Object.extend(Element.Methods.ByTag, {
      "FORM":     Object.clone(Form.Methods),
      "INPUT":    Object.clone(Form.Element.Methods),
      "SELECT":   Object.clone(Form.Element.Methods),
      "TEXTAREA": Object.clone(Form.Element.Methods)
    });
  }

  if (arguments.length == 2) {
    var tagName = methods;
    methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
    if (Object.isArray(tagName)) tagName.each(extend);
    else extend(tagName);
  }

  function extend(tagName) {
    tagName = tagName.toUpperCase();
    if (!Element.Methods.ByTag[tagName])
      Element.Methods.ByTag[tagName] = { };
    Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
    onlyIfAbsent = onlyIfAbsent || false;
    for (var property in methods) {
      var value = methods[property];
      if (!Object.isFunction(value)) continue;
      if (!onlyIfAbsent || !(property in destination))
        destination[property] = value.methodize();
    }
  }

  function findDOMClass(tagName) {
    var klass;
    var trans = {
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
      "FrameSet", "IFRAME": "IFrame"
    };
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName.capitalize() + 'Element';
    if (window[klass]) return window[klass];

    window[klass] = { };
    window[klass].prototype = document.createElement(tagName).__proto__;
    return window[klass];
  }

  if (F.ElementExtensions) {
    copy(Element.Methods, HTMLElement.prototype);
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
  }

  if (F.SpecificElementExtensions) {
    for (var tag in Element.Methods.ByTag) {
      var klass = findDOMClass(tag);
      if (Object.isUndefined(klass)) continue;
      copy(T[tag], klass.prototype);
    }
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};

document.viewport = {
  getDimensions: function() {
    var dimensions = { };
    var B = Prototype.Browser;
    $w('width height').each(function(d) {
      var D = d.capitalize();
      dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
        (B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
    });
    return dimensions;
  },

  getWidth: function() {
    return this.getDimensions().width;
  },

  getHeight: function() {
    return this.getDimensions().height;
  },

  getScrollOffsets: function() {
    return Element._returnOffset(
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
  }
};
/* Portions of the Selector class are derived from Jack Slocum’s DomQuery,
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
 * license.  Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
  initialize: function(expression) {
    this.expression = expression.strip();
    this.compileMatcher();
  },

  shouldUseXPath: function() {
    if (!Prototype.BrowserFeatures.XPath) return false;

    var e = this.expression;

    // Safari 3 chokes on :*-of-type and :empty
    if (Prototype.Browser.WebKit &&
     (e.include("-of-type") || e.include(":empty")))
      return false;

    // XPath can't do namespaced attributes, nor can it read
    // the "checked" property from DOM nodes
    if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
      return false;

    return true;
  },

  compileMatcher: function() {
    if (this.shouldUseXPath())
      return this.compileXPathMatcher();

    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m;

    if (Selector._cache[e]) {
      this.matcher = Selector._cache[e];
      return;
    }

    this.matcher = ["this.matcher = function(root) {",
                    "var r = root, h = Selector.handlers, c = false, n;"];

    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
              new Template(c[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.matcher.push("return h.unique(n);\n}");
    eval(this.matcher.join('\n'));
    Selector._cache[this.expression] = this.matcher;
  },

  compileXPathMatcher: function() {
    var e = this.expression, ps = Selector.patterns,
        x = Selector.xpath, le, m;

    if (Selector._cache[e]) {
      this.xpath = Selector._cache[e]; return;
    }

    this.matcher = ['.//*'];
    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        if (m = e.match(ps[i])) {
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
            new Template(x[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.xpath = this.matcher.join('');
    Selector._cache[this.expression] = this.xpath;
  },

  findElements: function(root) {
    root = root || document;
    if (this.xpath) return document._getElementsByXPath(this.xpath, root);
    return this.matcher(root);
  },

  match: function(element) {
    this.tokens = [];

    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
    var le, p, m;

    while (e && le !== e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          // use the Selector.assertions methods unless the selector
          // is too complex.
          if (as[i]) {
            this.tokens.push([i, Object.clone(m)]);
            e = e.replace(m[0], '');
          } else {
            // reluctantly do a document-wide search
            // and look for a match in the array
            return this.findElements(document).include(element);
          }
        }
      }
    }

    var match = true, name, matches;
    for (var i = 0, token; token = this.tokens[i]; i++) {
      name = token[0], matches = token[1];
      if (!Selector.assertions[name](element, matches)) {
        match = false; break;
      }
    }

    return match;
  },

  toString: function() {
    return this.expression;
  },

  inspect: function() {
    return "#<Selector:" + this.expression.inspect() + ">";
  }
});

Object.extend(Selector, {
  _cache: { },

  xpath: {
    descendant:   "//*",
    child:        "/*",
    adjacent:     "/following-sibling::*[1]",
    laterSibling: '/following-sibling::*',
    tagName:      function(m) {
      if (m[1] == '*') return '';
      return "[local-name()='" + m[1].toLowerCase() +
             "' or local-name()='" + m[1].toUpperCase() + "']";
    },
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
    id:           "[@id='#{1}']",
    attrPresence: function(m) {
      m[1] = m[1].toLowerCase();
      return new Template("[@#{1}]").evaluate(m);
    },
    attr: function(m) {
      m[1] = m[1].toLowerCase();
      m[3] = m[5] || m[6];
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
    },
    pseudo: function(m) {
      var h = Selector.xpath.pseudos[m[1]];
      if (!h) return '';
      if (Object.isFunction(h)) return h(m);
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
    },
    operators: {
      '=':  "[@#{1}='#{3}']",
      '!=': "[@#{1}!='#{3}']",
      '^=': "[starts-with(@#{1}, '#{3}')]",
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
      '*=': "[contains(@#{1}, '#{3}')]",
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
    },
    pseudos: {
      'first-child': '[not(preceding-sibling::*)]',
      'last-child':  '[not(following-sibling::*)]',
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
      'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
      'checked':     "[@checked]",
      'disabled':    "[@disabled]",
      'enabled':     "[not(@disabled)]",
      'not': function(m) {
        var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, v;

        var exclusion = [];
        while (e && le != e && (/\S/).test(e)) {
          le = e;
          for (var i in p) {
            if (m = e.match(p[i])) {
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
              e = e.replace(m[0], '');
              break;
            }
          }
        }
        return "[not(" + exclusion.join(" and ") + ")]";
      },
      'nth-child':      function(m) {
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
      },
      'nth-last-child': function(m) {
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
      },
      'nth-of-type':    function(m) {
        return Selector.xpath.pseudos.nth("position() ", m);
      },
      'nth-last-of-type': function(m) {
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
      },
      'first-of-type':  function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
      },
      'last-of-type':   function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
      },
      'only-of-type':   function(m) {
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
      },
      nth: function(fragment, m) {
        var mm, formula = m[6], predicate;
        if (formula == 'even') formula = '2n+0';
        if (formula == 'odd')  formula = '2n+1';
        if (mm = formula.match(/^(\d+)$/)) // digit only
          return '[' + fragment + "= " + mm[1] + ']';
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
          if (mm[1] == "-") mm[1] = -1;
          var a = mm[1] ? Number(mm[1]) : 1;
          var b = mm[2] ? Number(mm[2]) : 0;
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
          "((#{fragment} - #{b}) div #{a} >= 0)]";
          return new Template(predicate).evaluate({
            fragment: fragment, a: a, b: b });
        }
      }
    }
  },

  criteria: {
    tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
    className:    'n = h.className(n, r, "#{1}", c);    c = false;',
    id:           'n = h.id(n, r, "#{1}", c);           c = false;',
    attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
    attr: function(m) {
      m[3] = (m[5] || m[6]);
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
    },
    pseudo: function(m) {
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
    },
    descendant:   'c = "descendant";',
    child:        'c = "child";',
    adjacent:     'c = "adjacent";',
    laterSibling: 'c = "laterSibling";'
  },

  patterns: {
    // combinators must be listed first
    // (and descendant needs to be last combinator)
    laterSibling: /^\s*~\s*/,
    child:        /^\s*>\s*/,
    adjacent:     /^\s*\+\s*/,
    descendant:   /^\s/,

    // selectors follow
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
    id:           /^#([\w\-\*]+)(\b|$)/,
    className:    /^\.([\w\-\*]+)(\b|$)/,
    pseudo:
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
    attrPresence: /^\[([\w]+)\]/,
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
  },

  // for Selector.match and Element#match
  assertions: {
    tagName: function(element, matches) {
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
    },

    className: function(element, matches) {
      return Element.hasClassName(element, matches[1]);
    },

    id: function(element, matches) {
      return element.id === matches[1];
    },

    attrPresence: function(element, matches) {
      return Element.hasAttribute(element, matches[1]);
    },

    attr: function(element, matches) {
      var nodeValue = Element.readAttribute(element, matches[1]);
      return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
    }
  },

  handlers: {
    // UTILITY FUNCTIONS
    // joins two collections
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        a.push(node);
      return a;
    },

    // marks an array of nodes for counting
    mark: function(nodes) {
      var _true = Prototype.emptyFunction;
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = _true;
      return nodes;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = undefined;
      return nodes;
    },

    // mark each child node with its position (for nth calls)
    // "ofType" flag indicates whether we're indexing for nth-of-type
    // rather than nth-child
    index: function(parentNode, reverse, ofType) {
      parentNode._countedByPrototype = Prototype.emptyFunction;
      if (reverse) {
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
          var node = nodes[i];
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
        }
      } else {
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
      }
    },

    // filters out duplicates and extends all nodes
    unique: function(nodes) {
      if (nodes.length == 0) return nodes;
      var results = [], n;
      for (var i = 0, l = nodes.length; i < l; i++)
        if (!(n = nodes[i])._countedByPrototype) {
          n._countedByPrototype = Prototype.emptyFunction;
          results.push(Element.extend(n));
        }
      return Selector.handlers.unmark(results);
    },

    // COMBINATOR FUNCTIONS
    descendant: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, node.getElementsByTagName('*'));
      return results;
    },

    child: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        for (var j = 0, child; child = node.childNodes[j]; j++)
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
      }
      return results;
    },

    adjacent: function(nodes) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        var next = this.nextElementSibling(node);
        if (next) results.push(next);
      }
      return results;
    },

    laterSibling: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, Element.nextSiblings(node));
      return results;
    },

    nextElementSibling: function(node) {
      while (node = node.nextSibling)
          if (node.nodeType == 1) return node;
      return null;
    },

    previousElementSibling: function(node) {
      while (node = node.previousSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    // TOKEN FUNCTIONS
    tagName: function(nodes, root, tagName, combinator) {
      var uTagName = tagName.toUpperCase();
      var results = [], h = Selector.handlers;
      if (nodes) {
        if (combinator) {
          // fastlane for ordinary descendant combinators
          if (combinator == "descendant") {
            for (var i = 0, node; node = nodes[i]; i++)
              h.concat(results, node.getElementsByTagName(tagName));
            return results;
          } else nodes = this[combinator](nodes);
          if (tagName == "*") return nodes;
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
        return results;
      } else return root.getElementsByTagName(tagName);
    },

    id: function(nodes, root, id, combinator) {
      var targetNode = $(id), h = Selector.handlers;
      if (!targetNode) return [];
      if (!nodes && root == document) return [targetNode];
      if (nodes) {
        if (combinator) {
          if (combinator == 'child') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (targetNode.parentNode == node) return [targetNode];
          } else if (combinator == 'descendant') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Element.descendantOf(targetNode, node)) return [targetNode];
          } else if (combinator == 'adjacent') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Selector.handlers.previousElementSibling(targetNode) == node)
                return [targetNode];
          } else nodes = h[combinator](nodes);
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node == targetNode) return [targetNode];
        return [];
      }
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
    },

    className: function(nodes, root, className, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      return Selector.handlers.byClassName(nodes, root, className);
    },

    byClassName: function(nodes, root, className) {
      if (!nodes) nodes = Selector.handlers.descendant([root]);
      var needle = ' ' + className + ' ';
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
        nodeClassName = node.className;
        if (nodeClassName.length == 0) continue;
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
          results.push(node);
      }
      return results;
    },

    attrPresence: function(nodes, root, attr, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var results = [];
      for (var i = 0, node; node = nodes[i]; i++)
        if (Element.hasAttribute(node, attr)) results.push(node);
      return results;
    },

    attr: function(nodes, root, attr, value, operator, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var handler = Selector.operators[operator], results = [];
      for (var i = 0, node; node = nodes[i]; i++) {
        var nodeValue = Element.readAttribute(node, attr);
        if (nodeValue === null) continue;
        if (handler(nodeValue, value)) results.push(node);
      }
      return results;
    },

    pseudo: function(nodes, name, value, root, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      if (!nodes) nodes = root.getElementsByTagName("*");
      return Selector.pseudos[name](nodes, value, root);
    }
  },

  pseudos: {
    'first-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.previousElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'last-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.nextElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'only-child': function(nodes, value, root) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
          results.push(node);
      return results;
    },
    'nth-child':        function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root);
    },
    'nth-last-child':   function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true);
    },
    'nth-of-type':      function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, false, true);
    },
    'nth-last-of-type': function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true, true);
    },
    'first-of-type':    function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, false, true);
    },
    'last-of-type':     function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, true, true);
    },
    'only-of-type':     function(nodes, formula, root) {
      var p = Selector.pseudos;
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
    },

    // handles the an+b logic
    getIndices: function(a, b, total) {
      if (a == 0) return b > 0 ? [b] : [];
      return $R(1, total).inject([], function(memo, i) {
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
        return memo;
      });
    },

    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
    nth: function(nodes, formula, root, reverse, ofType) {
      if (nodes.length == 0) return [];
      if (formula == 'even') formula = '2n+0';
      if (formula == 'odd')  formula = '2n+1';
      var h = Selector.handlers, results = [], indexed = [], m;
      h.mark(nodes);
      for (var i = 0, node; node = nodes[i]; i++) {
        if (!node.parentNode._countedByPrototype) {
          h.index(node.parentNode, reverse, ofType);
          indexed.push(node.parentNode);
        }
      }
      if (formula.match(/^\d+$/)) { // just a number
        formula = Number(formula);
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.nodeIndex == formula) results.push(node);
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
        if (m[1] == "-") m[1] = -1;
        var a = m[1] ? Number(m[1]) : 1;
        var b = m[2] ? Number(m[2]) : 0;
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
          for (var j = 0; j < l; j++)
            if (node.nodeIndex == indices[j]) results.push(node);
        }
      }
      h.unmark(nodes);
      h.unmark(indexed);
      return results;
    },

    'empty': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        // IE treats comments as element nodes
        if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
        results.push(node);
      }
      return results;
    },

    'not': function(nodes, selector, root) {
      var h = Selector.handlers, selectorType, m;
      var exclusions = new Selector(selector).findElements(root);
      h.mark(exclusions);
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node._countedByPrototype) results.push(node);
      h.unmark(exclusions);
      return results;
    },

    'enabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node.disabled) results.push(node);
      return results;
    },

    'disabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.disabled) results.push(node);
      return results;
    },

    'checked': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.checked) results.push(node);
      return results;
    }
  },

  operators: {
    '=':  function(nv, v) { return nv == v; },
    '!=': function(nv, v) { return nv != v; },
    '^=': function(nv, v) { return nv.startsWith(v); },
    '$=': function(nv, v) { return nv.endsWith(v); },
    '*=': function(nv, v) { return nv.include(v); },
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
    '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
  },

  split: function(expression) {
    var expressions = [];
    expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
      expressions.push(m[1].strip());
    });
    return expressions;
  },

  matchElements: function(elements, expression) {
    var matches = $$(expression), h = Selector.handlers;
    h.mark(matches);
    for (var i = 0, results = [], element; element = elements[i]; i++)
      if (element._countedByPrototype) results.push(element);
    h.unmark(matches);
    return results;
  },

  findElement: function(elements, expression, index) {
    if (Object.isNumber(expression)) {
      index = expression; expression = false;
    }
    return Selector.matchElements(elements, expression || '*')[index || 0];
  },

  findChildElements: function(element, expressions) {
    expressions = Selector.split(expressions.join(','));
    var results = [], h = Selector.handlers;
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
      selector = new Selector(expressions[i].strip());
      h.concat(results, selector.findElements(element));
    }
    return (l > 1) ? h.unique(results) : results;
  }
});

if (Prototype.Browser.IE) {
  Object.extend(Selector.handlers, {
    // IE returns comment nodes on getElementsByTagName("*").
    // Filter them out.
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        if (node.tagName !== "!") a.push(node);
      return a;
    },

    // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node.removeAttribute('_countedByPrototype');
      return nodes;
    }
  });
}

function $$() {
  return Selector.findChildElements(document, $A(arguments));
}
var Form = {
  reset: function(form) {
    $(form).reset();
    return form;
  },

  serializeElements: function(elements, options) {
    if (typeof options != 'object') options = { hash: !!options };
    else if (Object.isUndefined(options.hash)) options.hash = true;
    var key, value, submitted = false, submit = options.submit;

    var data = elements.inject({ }, function(result, element) {
      if (!element.disabled && element.name) {
        key = element.name; value = $(element).getValue();
        if (value != null && (element.type != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
          if (key in result) {
            // a key is already present; construct an array of values
            if (!Object.isArray(result[key])) result[key] = [result[key]];
            result[key].push(value);
          }
          else result[key] = value;
        }
      }
      return result;
    });

    return options.hash ? data : Object.toQueryString(data);
  }
};

Form.Methods = {
  serialize: function(form, options) {
    return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
    return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child) {
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
          elements.push(Element.extend(child));
        return elements;
      }
    );
  },

  getInputs: function(form, typeName, name) {
    form = $(form);
    var inputs = form.getElementsByTagName('input');

    if (!typeName && !name) return $A(inputs).map(Element.extend);

    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
      var input = inputs[i];
      if ((typeName && input.type != typeName) || (name && input.name != name))
        continue;
      matchingInputs.push(Element.extend(input));
    }

    return matchingInputs;
  },

  disable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('disable');
    return form;
  },

  enable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('enable');
    return form;
  },

  findFirstElement: function(form) {
    var elements = $(form).getElements().findAll(function(element) {
      return 'hidden' != element.type && !element.disabled;
    });
    var firstByIndex = elements.findAll(function(element) {
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
    }).sortBy(function(element) { return element.tabIndex }).first();

    return firstByIndex ? firstByIndex : elements.find(function(element) {
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    form = $(form);
    form.findFirstElement().activate();
    return form;
  },

  request: function(form, options) {
    form = $(form), options = Object.clone(options || { });

    var params = options.parameters, action = form.readAttribute('action') || '';
    if (action.blank()) action = window.location.href;
    options.parameters = form.serialize(true);

    if (params) {
      if (Object.isString(params)) params = params.toQueryParams();
      Object.extend(options.parameters, params);
    }

    if (form.hasAttribute('method') && !options.method)
      options.method = form.method;

    return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/

Form.Element = {
  focus: function(element) {
    $(element).focus();
    return element;
  },

  select: function(element) {
    $(element).select();
    return element;
  }
};

Form.Element.Methods = {
  serialize: function(element) {
    element = $(element);
    if (!element.disabled && element.name) {
      var value = element.getValue();
      if (value != undefined) {
        var pair = { };
        pair[element.name] = value;
        return Object.toQueryString(pair);
      }
    }
    return '';
  },

  getValue: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    Form.Element.Serializers[method](element, value);
    return element;
  },

  clear: function(element) {
    $(element).value = '';
    return element;
  },

  present: function(element) {
    return $(element).value != '';
  },

  activate: function(element) {
    element = $(element);
    try {
      element.focus();
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
          !['button', 'reset', 'submit'].include(element.type)))
        element.select();
    } catch (e) { }
    return element;
  },

  disable: function(element) {
    element = $(element);
    element.blur();
    element.disabled = true;
    return element;
  },

  enable: function(element) {
    element = $(element);
    element.disabled = false;
    return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;
var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = {
  input: function(element, value) {
    switch (element.type.toLowerCase()) {
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element, value);
      default:
        return Form.Element.Serializers.textarea(element, value);
    }
  },

  inputSelector: function(element, value) {
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
    else element.checked = !!value;
  },

  textarea: function(element, value) {
    if (Object.isUndefined(value)) return element.value;
    else element.value = value;
  },

  select: function(element, index) {
    if (Object.isUndefined(index))
      return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
    else {
      var opt, value, single = !Object.isArray(index);
      for (var i = 0, length = element.length; i < length; i++) {
        opt = element.options[i];
        value = this.optionValue(opt);
        if (single) {
          if (value == index) {
            opt.selected = true;
            return;
          }
        }
        else opt.selected = index.include(value);
      }
    }
  },

  selectOne: function(element) {
    var index = element.selectedIndex;
    return index >= 0 ? this.optionValue(element.options[index]) : null;
  },

  selectMany: function(element) {
    var values, length = element.length;
    if (!length) return null;

    for (var i = 0, values = []; i < length; i++) {
      var opt = element.options[i];
      if (opt.selected) values.push(this.optionValue(opt));
    }
    return values;
  },

  optionValue: function(opt) {
    // extend element because hasAttribute may not be native
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
  }
};

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
    $super(callback, frequency);
    this.element   = $(element);
    this.lastValue = this.getValue();
  },

  execute: function() {
    var value = this.getValue();
    if (Object.isString(this.lastValue) && Object.isString(value) ?
        this.lastValue != value : String(this.lastValue) != String(value)) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
    this.element  = $(element);
    this.callback = callback;

    this.lastValue = this.getValue();
    if (this.element.tagName.toLowerCase() == 'form')
      this.registerFormCallbacks();
    else
      this.registerCallback(this.element);
  },

  onElementEvent: function() {
    var value = this.getValue();
    if (this.lastValue != value) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  },

  registerFormCallbacks: function() {
    Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        default:
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});
if (!window.Event) var Event = { };

Object.extend(Event, {
  KEY_BACKSPACE: 8,
  KEY_TAB:       9,
  KEY_RETURN:   13,
  KEY_ESC:      27,
  KEY_LEFT:     37,
  KEY_UP:       38,
  KEY_RIGHT:    39,
  KEY_DOWN:     40,
  KEY_DELETE:   46,
  KEY_HOME:     36,
  KEY_END:      35,
  KEY_PAGEUP:   33,
  KEY_PAGEDOWN: 34,
  KEY_INSERT:   45,

  cache: { },

  relatedTarget: function(event) {
    var element;
    switch(event.type) {
      case 'mouseover': element = event.fromElement; break;
      case 'mouseout':  element = event.toElement;   break;
      default: return null;
    }
    return Element.extend(element);
  }
});

Event.Methods = (function() {
  var isButton;

  if (Prototype.Browser.IE) {
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
    isButton = function(event, code) {
      return event.button == buttonMap[code];
    };

  } else if (Prototype.Browser.WebKit) {
    isButton = function(event, code) {
      switch (code) {
        case 0: return event.which == 1 && !event.metaKey;
        case 1: return event.which == 1 && event.metaKey;
        default: return false;
      }
    };

  } else {
    isButton = function(event, code) {
      return event.which ? (event.which === code + 1) : (event.button === code);
    };
  }

  return {
    isLeftClick:   function(event) { return isButton(event, 0) },
    isMiddleClick: function(event) { return isButton(event, 1) },
    isRightClick:  function(event) { return isButton(event, 2) },

    element: function(event) {
      var node = Event.extend(event).target;
      return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
    },

    findElement: function(event, expression) {
      var element = Event.element(event);
      if (!expression) return element;
      var elements = [element].concat(element.ancestors());
      return Selector.findElement(elements, expression, 0);
    },

    pointer: function(event) {
      return {
        x: event.pageX || (event.clientX +
          (document.documentElement.scrollLeft || document.body.scrollLeft)),
        y: event.pageY || (event.clientY +
          (document.documentElement.scrollTop || document.body.scrollTop))
      };
    },

    pointerX: function(event) { return Event.pointer(event).x },
    pointerY: function(event) { return Event.pointer(event).y },

    stop: function(event) {
      Event.extend(event);
      event.preventDefault();
      event.stopPropagation();
      event.stopped = true;
    }
  };
})();

Event.extend = (function() {
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
    m[name] = Event.Methods[name].methodize();
    return m;
  });

  if (Prototype.Browser.IE) {
    Object.extend(methods, {
      stopPropagation: function() { this.cancelBubble = true },
      preventDefault:  function() { this.returnValue = false },
      inspect: function() { return "[object Event]" }
    });

    return function(event) {
      if (!event) return false;
      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;
      var pointer = Event.pointer(event);
      Object.extend(event, {
        target: event.srcElement,
        relatedTarget: Event.relatedTarget(event),
        pageX:  pointer.x,
        pageY:  pointer.y
      });
      return Object.extend(event, methods);
    };

  } else {
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
    Object.extend(Event.prototype, methods);
    return Prototype.K;
  }
})();

Object.extend(Event, (function() {
  var cache = Event.cache;

  function getEventID(element) {
    if (element._prototypeEventID) return element._prototypeEventID[0];
    arguments.callee.id = arguments.callee.id || 1;
    return element._prototypeEventID = [++arguments.callee.id];
  }

  function getDOMEventName(eventName) {
    if (eventName && eventName.include(':')) return "dataavailable";
    return eventName;
  }

  function getCacheForID(id) {
    return cache[id] = cache[id] || { };
  }

  function getWrappersForEventName(id, eventName) {
    var c = getCacheForID(id);
    return c[eventName] = c[eventName] || [];
  }

  function createWrapper(element, eventName, handler) {
    var id = getEventID(element);
    var c = getWrappersForEventName(id, eventName);
    if (c.pluck("handler").include(handler)) return false;

    var wrapper = function(event) {
      if (!Event || !Event.extend ||
        (event.eventName && event.eventName != eventName))
          return false;

      Event.extend(event);
      
      /**
       * HACK 
       * @author Fortunato Geelhoed <fortunato@ifactory.com.au>
       */
      if (handler) {
        handler.call(element, event);
      }
    };

    wrapper.handler = handler;
    c.push(wrapper);
    return wrapper;
  }

  function findWrapper(id, eventName, handler) {
    var c = getWrappersForEventName(id, eventName);
    return c.find(function(wrapper) { return wrapper.handler == handler });
  }

  function destroyWrapper(id, eventName, handler) {
    var c = getCacheForID(id);
    if (!c[eventName]) return false;
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
  }

  function destroyCache() {
    for (var id in cache)
      for (var eventName in cache[id])
        cache[id][eventName] = null;
  }

  if (window.attachEvent) {
    window.attachEvent("onunload", destroyCache);
  }

  return {
    observe: function(element, eventName, handler) {
      element = $(element);
      var name = getDOMEventName(eventName);

      var wrapper = createWrapper(element, eventName, handler);
      if (!wrapper) return element;

      if (element.addEventListener) {
        element.addEventListener(name, wrapper, false);
      } else {
        element.attachEvent("on" + name, wrapper);
      }

      return element;
    },

    stopObserving: function(element, eventName, handler) {
      element = $(element);
      var id = getEventID(element), name = getDOMEventName(eventName);

      if (!handler && eventName) {
        getWrappersForEventName(id, eventName).each(function(wrapper) {
          element.stopObserving(eventName, wrapper.handler);
        });
        return element;

      } else if (!eventName) {
        Object.keys(getCacheForID(id)).each(function(eventName) {
          element.stopObserving(eventName);
        });
        return element;
      }

      var wrapper = findWrapper(id, eventName, handler);
      if (!wrapper) return element;

      if (element.removeEventListener) {
        element.removeEventListener(name, wrapper, false);
      } else {
        element.detachEvent("on" + name, wrapper);
      }

      destroyWrapper(id, eventName, handler);

      return element;
    },

    fire: function(element, eventName, memo) {
      element = $(element);
      if (element == document && document.createEvent && !element.dispatchEvent)
        element = document.documentElement;

      var event;
      if (document.createEvent) {
        event = document.createEvent("HTMLEvents");
        event.initEvent("dataavailable", true, true);
      } else {
        event = document.createEventObject();
        event.eventType = "ondataavailable";
      }

      event.eventName = eventName;
      event.memo = memo || { };

      if (document.createEvent) {
        element.dispatchEvent(event);
      } else {
        element.fireEvent(event.eventType, event);
      }

      return Event.extend(event);
    }
  };
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
  fire:          Event.fire,
  observe:       Event.observe,
  stopObserving: Event.stopObserving
});

Object.extend(document, {
  fire:          Element.Methods.fire.methodize(),
  observe:       Element.Methods.observe.methodize(),
  stopObserving: Element.Methods.stopObserving.methodize(),
  loaded:        false
});

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards and John Resig. */

  var timer;

  function fireContentLoadedEvent() {
    if (document.loaded) return;
    if (timer) window.clearInterval(timer);
    document.fire("dom:loaded");
    document.loaded = true;
  }

  if (document.addEventListener) {
    if (Prototype.Browser.WebKit) {
      timer = window.setInterval(function() {
        if (/loaded|complete/.test(document.readyState))
          fireContentLoadedEvent();
      }, 0);

      Event.observe(window, "load", fireContentLoadedEvent);

    } else {
      document.addEventListener("DOMContentLoaded",
        fireContentLoadedEvent, false);
    }

  } else {
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
    $("__onDOMContentLoaded").onreadystatechange = function() {
      if (this.readyState == "complete") {
        this.onreadystatechange = null;
        fireContentLoadedEvent();
      }
    };
  }
})();
/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
    return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
    return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
    return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
    return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

// This should be moved to script.aculo.us; notice the deprecated methods
// further below, that map to the newer Element methods.
var Position = {
  // set to true if needed, warning: firefox performance problems
  // NOT neeeded for page scrolling, only if draggable contained in
  // scrollable elements
  includeScrollOffsets: false,

  // must be called before calling withinIncludingScrolloffset, every time the
  // page is scrolled
  prepare: function() {
    this.deltaX =  window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
    this.deltaY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
  },

  // caches x/y coordinate pair to use with overlap
  within: function(element, x, y) {
    if (this.includeScrollOffsets)
      return this.withinIncludingScrolloffsets(element, x, y);
    this.xcomp = x;
    this.ycomp = y;
    this.offset = Element.cumulativeOffset(element);

    return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
    var offsetcache = Element.cumulativeScrollOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = Element.cumulativeOffset(element);

    return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  // within must be called directly before
  overlap: function(mode, element) {
    if (!mode) return 0;
    if (mode == 'vertical')
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
        element.offsetHeight;
    if (mode == 'horizontal')
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
        element.offsetWidth;
  },

  // Deprecation layer -- use newer Element methods now (1.5.2).

  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
    Position.prepare();
    return Element.absolutize(element);
  },

  relativize: function(element) {
    Position.prepare();
    return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
    options = options || { };
    return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
    className = className.toString().strip();
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
    className = className.toString().strip();
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
    if (!classNames && !className) return elements;

    var nodes = $(element).getElementsByTagName('*');
    className = ' ' + className + ' ';

    for (var i = 0, child, cn; child = nodes[i]; i++) {
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
          (classNames && classNames.all(function(name) {
            return !name.toString().blank() && cn.include(' ' + name + ' ');
          }))))
        elements.push(Element.extend(child));
    }
    return elements;
  };

  return function(className, parentElement) {
    return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
    this.element = $(element);
  },

  _each: function(iterator) {
    this.element.className.split(/\s+/).select(function(name) {
      return name.length > 0;
    })._each(iterator);
  },

  set: function(className) {
    this.element.className = className;
  },

  add: function(classNameToAdd) {
    if (this.include(classNameToAdd)) return;
    this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
    return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

Element.addMethods();

/**
 * @author Ryan Johnson <ryan@livepipe.net>
 * @copyright 2007 LivePipe LLC
 * @package Control.Modal
 * @license MIT
 * @url http://livepipe.net/projects/control_modal/
 * @version 2.2.3
 */

if(typeof(Control) == "undefined")
    Control = {};
Control.Modal = Class.create();
Object.extend(Control.Modal,{
    loaded: false,
    loading: false,
    loadingTimeout: false,
    overlay: false,
    container: false,
    current: false,
    ie: false,
    effects: {
        containerFade: false,
        containerAppear: false,
        overlayFade: false,
        overlayAppear: false
    },
    targetRegexp: /#(.+)$/,
    imgRegexp: /\.(jpe?g|gif|png|tiff?)$/i,
    overlayStyles: {
        position: 'fixed',
        top: 0,
        left: 0,
        width: '100%',
        height: '100%',
        zIndex: 9998
    },
    overlayIEStyles: {
        position: 'absolute',
        top: 0,
        left: 0,
        zIndex: 9998
    },
    disableHoverClose: false,
    load: function(){
        if(!Control.Modal.loaded){
            Control.Modal.loaded = true;
            Control.Modal.ie = !(typeof document.body.style.maxHeight != 'undefined');
            Control.Modal.overlay = $(document.createElement('div'));
            Control.Modal.overlay.id = 'modal_overlay';
            Object.extend(Control.Modal.overlay.style,Control.Modal['overlay' + (Control.Modal.ie ? 'IE' : '') + 'Styles']);
            Control.Modal.overlay.hide();
            Control.Modal.container = $(document.createElement('div'));
            Control.Modal.container.id = 'modal_container';
            Control.Modal.container.hide();
            Control.Modal.loading = $(document.createElement('div'));
            Control.Modal.loading.id = 'modal_loading';
            Control.Modal.loading.hide();
            var body_tag = document.getElementsByTagName('body')[0];
            body_tag.appendChild(Control.Modal.overlay);
            body_tag.appendChild(Control.Modal.container);
            body_tag.appendChild(Control.Modal.loading);
            Control.Modal.container.observe('mouseout',function(event){
                if(!Control.Modal.disableHoverClose && Control.Modal.current && Control.Modal.current.options.hover && !Position.within(Control.Modal.container,Event.pointerX(event),Event.pointerY(event)))
                    Control.Modal.close();
            });
        }
    },
    open: function(contents,options){
        options = options || {};
        if(!options.contents)
            options.contents = contents;
        var modal_instance = new Control.Modal(false,options);
        modal_instance.open();
        return modal_instance;
    },
    close: function(force){
        if(typeof(force) != 'boolean')
            force = false;
        if(Control.Modal.current)
            Control.Modal.current.close(force);
    },
    attachEvents: function(){
        Event.observe(window,'load',Control.Modal.load);
        Event.observe(window,'unload',Event.unloadCache,false);
    },
    center: function(element){
        if(!element._absolutized){
            element.setStyle({
                position: 'absolute'
            }); 
            element._absolutized = true;
        }
        var dimensions = element.getDimensions();
        Position.prepare();
        var offset_left = (Position.deltaX + Math.floor((Control.Modal.getWindowWidth() - dimensions.width) / 2));
        var offset_top = (Position.deltaY + ((Control.Modal.getWindowHeight() > dimensions.height) ? Math.floor((Control.Modal.getWindowHeight() - dimensions.height) / 2) : 0));
        element.setStyle({
            top: ((dimensions.height <= Control.Modal.getDocumentHeight()) ? ((offset_top != null && offset_top > 0) ? offset_top : '0') + 'px' : 0),
            left: ((dimensions.width <= Control.Modal.getDocumentWidth()) ? ((offset_left != null && offset_left > 0) ? offset_left : '0') + 'px' : 0)
        });
    },
    getWindowWidth: function(){
        return (self.innerWidth || document.documentElement.clientWidth || document.body.clientWidth || 0);
    },
    getWindowHeight: function(){
        return (self.innerHeight ||  document.documentElement.clientHeight || document.body.clientHeight || 0);
    },
    getDocumentWidth: function(){
        return Math.min(document.body.scrollWidth,Control.Modal.getWindowWidth());
    },
    getDocumentHeight: function(){
        return Math.max(document.body.scrollHeight,Control.Modal.getWindowHeight());
    },
    onKeyDown: function(event){
        if(event.keyCode == Event.KEY_ESC)
            Control.Modal.close();
    }
});
Object.extend(Control.Modal.prototype,{
    mode: '',
    html: false,
    href: '',
    element: false,
    src: false,
    imageLoaded: false,
    ajaxRequest: false,
    initialize: function(element,options){
        this.element = $(element);
        this.options = {
            beforeOpen: Prototype.emptyFunction,
            afterOpen: Prototype.emptyFunction,
            beforeClose: Prototype.emptyFunction,
            afterClose: Prototype.emptyFunction,
            onSuccess: Prototype.emptyFunction,
            onFailure: Prototype.emptyFunction,
            onException: Prototype.emptyFunction,
            beforeImageLoad: Prototype.emptyFunction,
            afterImageLoad: Prototype.emptyFunction,
            autoOpenIfLinked: true,
            contents: false,
            loading: false, //display loading indicator
            fade: false,
            fadeDuration: 0.75,
            image: false,
            imageCloseOnClick: true,
            hover: false,
            iframe: false,
            iframeTemplate: new Template('<iframe src="#{href}" width="100%" height="100%" frameborder="0" id="#{id}"></iframe>'),
            evalScripts: true, //for Ajax, define here instead of in requestOptions
            requestOptions: {}, //for Ajax.Request
            overlayDisplay: true,
            overlayClassName: '',
            overlayCloseOnClick: true,
            containerClassName: '',
            opacity: 0.5,
            zIndex: 9998,
            width: null,
            height: null,
            offsetLeft: 0, //for use with 'relative'
            offsetTop: 0, //for use with 'relative'
            position: 'absolute' //'absolute' or 'relative'
        };
        Object.extend(this.options,options || {});
        var target_match = false;
        var image_match = false;
        if(this.element){
            target_match = Control.Modal.targetRegexp.exec(this.element.href);
            image_match = Control.Modal.imgRegexp.exec(this.element.href);
        }
        if(this.options.position == 'mouse')
            this.options.hover = true;
        if(this.options.contents){
            this.mode = 'contents';
        }else if(this.options.image || image_match){
            this.mode = 'image';
            this.src = this.element.href;
        }else if(target_match){
            this.mode = 'named';
            var x = $(target_match[1]);
            this.html = x.innerHTML;
            x.remove();
            this.href = target_match[1];
        }else{
            this.mode = (this.options.iframe) ? 'iframe' : 'ajax';
            this.href = this.element.href;
        }
        if(this.element){
            if(this.options.hover){
                this.element.observe('mouseover',this.open.bind(this));
                this.element.observe('mouseout',function(event){
                    if(!Position.within(Control.Modal.container,Event.pointerX(event),Event.pointerY(event)))
                        this.close();
                }.bindAsEventListener(this));
            }else{
                this.element.onclick = function(event){
                    this.open();
                    Event.stop(event);
                    return false;
                }.bindAsEventListener(this);
            }
        }
        var targets = Control.Modal.targetRegexp.exec(window.location);
        this.position = function(event){
            if(this.options.position == 'absolute')
                Control.Modal.center(Control.Modal.container);
            else{
                var xy = (event && this.options.position == 'mouse' ? [Event.pointerX(event),Event.pointerY(event)] : Position.cumulativeOffset(this.element));
                Control.Modal.container.setStyle({
                    position: 'absolute',
                    top: xy[1] + (typeof(this.options.offsetTop) == 'function' ? this.options.offsetTop() : this.options.offsetTop) + 'px',
                    left: xy[0] + (typeof(this.options.offsetLeft) == 'function' ? this.options.offsetLeft() : this.options.offsetLeft) + 'px'
                });
            }
            if(Control.Modal.ie){
                Control.Modal.overlay.setStyle({
                    height: Control.Modal.getDocumentHeight() + 'px',
                    width: Control.Modal.getDocumentWidth() + 'px'
                });
            }
        }.bind(this);
        if(this.mode == 'named' && this.options.autoOpenIfLinked && targets && targets[1] && targets[1] == this.href)
            this.open();
    },
    showLoadingIndicator: function(){
        if(this.options.loading){
            Control.Modal.loadingTimeout = window.setTimeout(function(){
                var modal_image = $('modal_image');
                if(modal_image)
                    modal_image.hide();
                Control.Modal.loading.style.zIndex = this.options.zIndex + 1;
                Control.Modal.loading.update('<img id="modal_loading" src="' + this.options.loading + '"/>');
                Control.Modal.loading.show();
                Control.Modal.center(Control.Modal.loading);
            }.bind(this),250);
        }
    },
    hideLoadingIndicator: function(){
        if(this.options.loading){
            if(Control.Modal.loadingTimeout)
                window.clearTimeout(Control.Modal.loadingTimeout);
            var modal_image = $('modal_image');
            if(modal_image)
                modal_image.show();
            Control.Modal.loading.hide();
        }
    },
    open: function(force){
        if(!force && this.notify('beforeOpen') === false)
            return;
        if(!Control.Modal.loaded)
            Control.Modal.load();
        Control.Modal.close();
        if(!this.options.hover)
            Event.observe($(document.getElementsByTagName('body')[0]),'keydown',Control.Modal.onKeyDown);
        Control.Modal.current = this;
/**
 * MODIFIED
 *
 * Changed to prevent to get the error message "too much recursion" on Firefox
 * (On IE it says "Stack overflow at line 0") when it uses the function prepareModal in SGL.js
 * with the files 'js/scriptaculous/src/effects.js' and 'js/accordion2.js'.
 */
        /*
        if(!this.options.hover)
            Control.Modal.overlay.setStyle({
                zIndex: this.options.zIndex,
                opacity: this.options.opacity
            });
        }
        */
        
        if(!this.options.hover) {
            Control.Modal.overlay.style.zIndex  = this.options.zIndex;
            Control.Modal.overlay.style.opacity = this.options.opacity;
            Control.Modal.overlay.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='+ (this.options.opacity*100) + ')';
        }
        
/**
 * MODIFIED END
 */
        Control.Modal.container.setStyle({
            zIndex: this.options.zIndex + 1,
            width: (this.options.width ? (typeof(this.options.width) == 'function' ? this.options.width() : this.options.width) + 'px' : null),
            height: (this.options.height ? (typeof(this.options.height) == 'function' ? this.options.height() : this.options.height) + 'px' : null)
        });
        if(Control.Modal.ie && !this.options.hover){
            $A(document.getElementsByTagName('select')).each(function(select){
                select.style.visibility = 'hidden';
            });
        }
        Control.Modal.overlay.addClassName(this.options.overlayClassName);
        Control.Modal.container.addClassName(this.options.containerClassName);
        switch(this.mode){
            case 'image':
                this.imageLoaded = false;
                this.notify('beforeImageLoad');
                this.showLoadingIndicator();
                var img = document.createElement('img');
                img.onload = function(img){
                    this.hideLoadingIndicator();
                    this.update([img]);
                    if(this.options.imageCloseOnClick)
                        $(img).observe('click',Control.Modal.close);
                    this.position();
                    this.notify('afterImageLoad');
                    img.onload = null;
                }.bind(this,img);
                img.src = this.src;
                img.id = 'modal_image';
                break;
            case 'ajax':
                this.notify('beforeLoad');
                var options = {
                    method: 'post',
                    onSuccess: function(request){
                        this.hideLoadingIndicator();
                        this.update(request.responseText);
                        this.notify('onSuccess',request);
                        this.ajaxRequest = false;
                    }.bind(this),
                    onFailure: function(){
                        this.notify('onFailure');
                    }.bind(this),
                    onException: function(){
                        this.notify('onException');
                    }.bind(this)
                };
                Object.extend(options,this.options.requestOptions);
                this.showLoadingIndicator();
                this.ajaxRequest = new Ajax.Request(this.href,options);
                break;
            case 'iframe':
                this.update(this.options.iframeTemplate.evaluate({href: this.href, id: 'modal_iframe'}));
                break;
            case 'contents':
                this.update((typeof(this.options.contents) == 'function' ? this.options.contents() : this.options.contents));
                break;
            case 'named':
                this.update(this.html);
                break;
        }
        if(!this.options.hover){
            if(this.options.overlayCloseOnClick && this.options.overlayDisplay)
                Control.Modal.overlay.observe('click',Control.Modal.close);
            if(this.options.overlayDisplay){
                if(this.options.fade){
                    if(Control.Modal.effects.overlayFade)
                        Control.Modal.effects.overlayFade.cancel();
                    Control.Modal.effects.overlayAppear = new Effect.Appear(Control.Modal.overlay,{
                        queue: {
                            position: 'front',
                            scope: 'Control.Modal'
                        },
                        to: this.options.opacity,
                        duration: this.options.fadeDuration / 2
                    });
                }else
                    Control.Modal.overlay.show();
            }
        }
        if(this.options.position == 'mouse'){
            this.mouseHoverListener = this.position.bindAsEventListener(this);
            this.element.observe('mousemove',this.mouseHoverListener);
        }
        this.notify('afterOpen');
    },
    update: function(html){
        if(typeof(html) == 'string')
            Control.Modal.container.update(html);
        else{
            Control.Modal.container.update('');
            (html.each) ? html.each(function(node){
                Control.Modal.container.appendChild(node);
            }) : Control.Modal.container.appendChild(node);
        }
        if(this.options.fade){
            if(Control.Modal.effects.containerFade)
                Control.Modal.effects.containerFade.cancel();
            Control.Modal.effects.containerAppear = new Effect.Appear(Control.Modal.container,{
                queue: {
                    position: 'end',
                    scope: 'Control.Modal'
                },
                to: 1,
                duration: this.options.fadeDuration / 2
            });
        }else
            Control.Modal.container.show();
        this.position();
        Event.observe(window,'resize',this.position,false);
        Event.observe(window,'scroll',this.position,false);
    },
    close: function(force){
        if(!force && this.notify('beforeClose') === false)
            return;
        if(this.ajaxRequest)
            this.ajaxRequest.transport.abort();
        this.hideLoadingIndicator();    
        if(this.mode == 'image'){
            var modal_image = $('modal_image');
            if(this.options.imageCloseOnClick && modal_image)
                modal_image.stopObserving('click',Control.Modal.close);
        }
        if(Control.Modal.ie && !this.options.hover){
            $A(document.getElementsByTagName('select')).each(function(select){
                select.style.visibility = 'visible';
            });            
        }
        if(!this.options.hover)
            Event.stopObserving(window,'keyup',Control.Modal.onKeyDown);
        Control.Modal.current = false;
        Event.stopObserving(window,'resize',this.position,false);
        Event.stopObserving(window,'scroll',this.position,false);
        if(!this.options.hover){
            if(this.options.overlayCloseOnClick && this.options.overlayDisplay)
                Control.Modal.overlay.stopObserving('click',Control.Modal.close);
            if(this.options.overlayDisplay){
                if(this.options.fade){
                    if(Control.Modal.effects.overlayAppear)
                        Control.Modal.effects.overlayAppear.cancel();
                    Control.Modal.effects.overlayFade = new Effect.Fade(Control.Modal.overlay,{
                        queue: {
                            position: 'end',
                            scope: 'Control.Modal'
                        },
                        from: this.options.opacity,
                        to: 0,
                        duration: this.options.fadeDuration / 2
                    });
                }else
                    Control.Modal.overlay.hide();
            }
        }
        if(this.options.fade){
            if(Control.Modal.effects.containerAppear)
                Control.Modal.effects.containerAppear.cancel();
            Control.Modal.effects.containerFade = new Effect.Fade(Control.Modal.container,{
                queue: {
                    position: 'front',
                    scope: 'Control.Modal'
                },
                from: 1,
                to: 0,
                duration: this.options.fadeDuration / 2,
                afterFinish: function(){
                    Control.Modal.container.update('');
                    this.resetClassNameAndStyles();
                }.bind(this)
            });
        }else{
            Control.Modal.container.hide();
            Control.Modal.container.update('');
            this.resetClassNameAndStyles();
        }
        if(this.options.position == 'mouse')
            this.element.stopObserving('mousemove',this.mouseHoverListener);
        this.notify('afterClose');
    },
    resetClassNameAndStyles: function(){
        Control.Modal.overlay.removeClassName(this.options.overlayClassName);
        Control.Modal.container.removeClassName(this.options.containerClassName);
        Control.Modal.container.setStyle({
            height: null,
            width: null,
            top: null,
            left: null
        });
    },
    notify: function(event_name){
        try{
            if(this.options[event_name])
                return [this.options[event_name].apply(this.options[event_name],$A(arguments).slice(1))];
        }catch(e){
            if(e != $break)
                throw e;
            else
                return false;
        }
    }
});
if(typeof(Object.Event) != 'undefined')
    Object.Event.extend(Control.Modal);
Control.Modal.attachEvents();

/*    sIFR v2.0.7
    Copyright 2004 - 2008 Mark Wubben and Mike Davidson. Prior contributions by Shaun Inman and Tomas Jogin.

    This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>
*/

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/*	SWFObject v2.0 <http://code.google.com/p/swfobject/>
	Copyright (c) 2007 Geoff Stearns, Michael Williams, and Bobby van der Sluis
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*/
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/**
 * Javascript hash as Ajax WNotification Manager
 * @author Hiro Nozu <hiro@ifactory.com.au>
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var notificationInterval = 30; // 30 sec
//var notificationInterval = 20; // 20 sec
//var notificationInterval = 15; // 15 sec
//var notificationInterval = 10; // 10 sec
//var notificationInterval = 5; // 5 sec

var notificationDecay = 1;

var notificationAjax;

var ajaxNotificationMgr = function()
{
    this.do_chat = function(notificationId, userId)
    {
        return displayChatWindow(userId, 0, notificationId);
    }
    this.do_restartFetchNotification = function()
    {
        notificationAjax.stop();
        notificationAjax.start();
    }
    this.do_sendNotification = function(notificationId, notificationType, userId, message)
    {
        userId  = (userId != undefined) ? userId : 0;
        message = (message != undefined) ? message : '';
        new Ajax.Request( makeUrl({module: "wnotification", action: "sendNotification", 'notificationId': notificationId, 'notificationType': notificationType, 'userId': userId, 'message': message}), {
            method: 'get',
            asynchronous: true,
            onSuccess: function(transport) {
                var json = transport.responseText.evalJSON();
                if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                } else {
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    ajaxNotificationMgr.do_restartFetchNotification();
                }
            },
            onFailure: function(transport) {
                // @todo do decent error handling?
                // alert('An error ocurred while trying to update the notification.');
                ajaxNotificationMgr.do_restartFetchNotification();
            }
        });
        return false;
    }
    this.do_discardNotification = function(notificationId, status)
    {
        status = (status != undefined) ? status : '';
        new Ajax.Request( makeUrl({module: "wnotification", action: "discardNotification", 'notificationId': notificationId, 'status': status}), {
            method: 'get',
            asynchronous: true,
            onSuccess: function(transport) {
                var json = transport.responseText.evalJSON();
                if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                } else {
                    // displayDebug(json.debug);
                    // displayMessage(json.message);
                    ajaxNotificationMgr.do_restartFetchNotification();
                }
            },
            onFailure: function(transport) {
                // @todo do decent error handling?
                // alert('An error ocurred while trying to update the notification.');
                ajaxNotificationMgr.do_restartFetchNotification();
            }
        });
        return false;
    }
    this.do_fetchNotification = function()
    {
        // alert(onlineStatus.getUserList());
        notificationAjax = new Ajax.PeriodicalUpdater('', makeUrl({module: "wnotification", action: "fetchNotification", userIds: onlineStatus.getUserList()}), {
            method: 'get',
            asynchronous: true,
            frequency: notificationInterval,
            decay: notificationDecay,
            onSuccess: function(transport) {

                var json = transport.responseText.evalJSON();

                if (json.error) {
                    // reportError(json.error);
                    // displayDebug(json.debug);
                } else {
                    displayDebug(json.debug);
                    // displayMessage(json.message);
                    $('notification-bar-wrapper').update(json.data['list']);
                    //alert(json.data['list'].length)
                    if (json.data['list'].length <= 1) {
                        $('notification-bar-outer-wrapper').hide();
                    } else {
                        $('notification-bar-outer-wrapper').setStyle({
                            display: 'block'
                        });
                    }
                    if (json.data['online'] != undefined) {
                        // displayMessage(':' + json.data['online'][0]['usr_id']);
                        onlineStatus.batchUpdate(json.data['online']);
                        onlineStatus.refreshOnlineStatus();
                        // displayMessage(onlineStatus.getUserList());
                    }
                }
            },
            onFailure: function(transport) {
                // @todo do decent error handling?
                // alert('An error ocurred while trying to update the notification.');
            }
        });
    }
}
function execAjaxNotificationMgr() {
    ajaxNotificationMgr.do_fetchNotification();
}
ajaxNotificationMgr = new ajaxNotificationMgr();