// Phorum object. Other JavaScript code for Phorum can extend
// this one to implement functionality without risking name
// name space collissions.
Phorum = {};

/* Added by module "core", file "include/ajax/client.js.php" */
// Create the Phorum object if it's not available. It it created in the
// core javascript.php, but when loading this code from an external
// page, it might not be available.
if (!document.Phorum || Phorum == undefined) Phorum = {};

Phorum.Ajax = {};

// The version of this lib
Phorum.Ajax.version = '1.0.0';

// The URL that we use to access the Phorum Ajax layer.
Phorum.Ajax.URL = 'http://www.gobages.com/forum-mouche/ajax.php';

// Storage for Ajax call return data. This acts as a local cache
// for keeping track of already retrieved items.
Phorum.Ajax.cache = {};

/**
 * Create an XMLHttpRequest object.
 * Used internally by Phorum.Ajax.call().
 * Raise an onFailure event in case no object can be created.
 * Return either an object or null if the object creation failed.
 */
Phorum.Ajax.getXMLHttpRequest = function(req)
{
    var xhr;
    if (window.XMLHttpRequest) {
        xhr = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        var versions = [
            'MSXML2.XMLHttp.5.0',
            'MSXML2.XMLHttp.4.0',
            'MSXML2.XMLHttp.3.0',
            'MSXML2.XMLHttp',
            'Microsoft.XMLHttp'
        ];
        for (var i=0; i < versions.length; i++) {
            try { xhr = new ActiveXObject(versions[i]); } catch (e) { }
        }
    }

    if (xhr) {
        return xhr;
    }

    if (req.onFailure) req.onFailure(
        'Phorum: Unable to create an XMLHttpRequest object',
        -1, null
    );
    return null;
}

/**
 * Execute an Ajax Phorum call.
 */
Phorum.Ajax.call = function(req)
{
    // If the store property is set for the request, then check
    // if the data for the request is already available in the
    // local cache. If yes, then return the data immediately.
    if (req.store) {
        if (req.store != null && Phorum.Ajax.cache[req.store]) {
            if (req.onSuccess) {
                // true = data retrieved from cache.
                req.onSuccess(Phorum.Ajax.cache[req.store], true);
            }
            return;
        }
    }

    // Check the request data.
    if (! req['call']) {
        if (req.onFailure) req.onFailure(
            'Phorum.Ajax.call() error: missing property ' +
            '"call" for the request object.',
            -1, null
        );
        return;
    }

    // Check if there is an XMLHttpRequest object available.
    var xhr = Phorum.Ajax.getXMLHttpRequest(req);
    if (! xhr) return;

    // Convert the request object to JSON.
    var json = Phorum.JSON.encode(req);

    // Notify the start of the request loading stage.
    if (req.onRequest) req.onRequest(json);

    xhr.open("post", Phorum.Ajax.URL, true);
    xhr.setRequestHeader("Content-Type", "text/x-json");
    xhr.onreadystatechange = function()
    {
      if (req.onReadStateChange) req.onReadyStateChange(req);

      switch (xhr.readyState)
      {
          case 1:

              if (req.onLoading) req.onLoading(xhr);
              break;

          case 2:

              if (req.onLoaded) req.onLoaded(xhr);
              break;

          case 3:

              if (req.onInteractive) req.onInteractive(xhr);
              break;

          case 4:

              if (req.onComplete)req.onComplete(xhr);

              if (req.onResponse) req.onResponse(xhr.responseText);

              if (xhr.status == 200) {

                  // Evaluate the returned JSON code. If evaluation fails,
                  // then run the onFailure event for the Phorum.Ajax.call.
                  try {
                      var res = Phorum.JSON.decode(xhr.responseText);
                  } catch (e) {
                      if (req.onFailure) req.onFailure(
                        'Ajax Phorum API call succeeded, but the return ' +
                        'data could not be parsed as JSON data.',
                        xhr.status, xhr.responseText
                      );
                      return;
                  }

                  // If the req.store property is set, then we store
                  // the result data in the Phorum cache.
                  if (req.store) Phorum.Ajax.cache[req.store] = res;

                  // false = data not retrieved from store.
                  if (req.onSuccess) req.onSuccess(res, false);

              } else {

                  if (req.onFailure) req.onFailure(
                      'The Ajax Phorum API call failed',
                      xhr.status, xhr.responseText
                  );
              }

              break;
      }
    };
    xhr.send(json);
}

// Invalidate a single cache item of the full cache.
Phorum.Ajax.invalidateCache = function(key)
{
    if (key) {
        Phorum.Ajax.cache[key] = null;
    } else {
        Phorum.Ajax.cache = new Array();
    }
}

// Parse out javascript blocks from the data to eval them. Adding them
// to the page using innerHTML does not invoke parsing by the browser.
Phorum.Ajax.evalJavaScript = function(data)
{
    var cursor = 0;
    var start  = 1;
    var end    = 1;

    while (cursor < data.length && start > 0 && end > 0) {
        start = data.indexOf('<script', cursor);
        end   = data.indexOf('</script', cursor);
        if (end > start && end > -1) {
            if (start > -1) {
                var res = data.substring(start, end);
                start = res.indexOf('>') + 1;
                res = res.substring(start);
                if (res.length != 0) {
                    eval(res);
                }
            }
            cursor = end + 1;
        }
    }
}

// ======================================================================
// JSON encoder and decoder
// Based on byteson by Andrea Giammarchi
// (http://www.devpro.it/byteson/)
// ======================================================================

Phorum.JSON = {};

Phorum.JSON.common =
{
  // characters object, useful to convert some char in a JSON compatible way
  c:{'\b':'b','\t':'t','\n':'n','\f':'f','\r':'r','"':'"','\\':'\\','/':'/'},

  // decimal function, returns a string with length === 2 for date convertion
  d:function(n){return n < 10 ? '0'.concat(n) : n},

  // integer function, returns integer value from a piece of string
  i:function(e, p, l){return parseInt(e.substr(p, l))},

  // slash function, add a slash before a common.c char
  s:function(i,d){return '\\'.concat(Phorum.JSON.common.c[d])},

  // unicode function, return respective unicode string
  u:function(i,d){var n = d.charCodeAt(0).toString(16);return '\\u'.concat(n.length < 2 ? '000' : '00', n)}
};

Phorum.JSON.convert = function(params, result)
{
    switch(params.constructor) {
        case Number:
            result = isFinite(params) ? String(params) : 'null';
            break;
        case Boolean:
            result = String(params);
            break;
        case Date:
            result = concat(
                '"',
                params.getFullYear(), '-',
                Phorum.JSON.common.d(params.getMonth() + 1), '-',
                Phorum.JSON.common.d(params.getDate()), 'T',
                Phorum.JSON.common.d(params.getHours()), ':',
                Phorum.JSON.common.d(params.getMinutes()), ':',
                Phorum.JSON.common.d(params.getSeconds()),
                '"'
            );
            break;
        case String:
            if(/^[0-9]{4}\-[0-9]{2}\-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}$/.test(params)){
                result = new Date;
                result.setHours(Phorum.JSON.common.i(params, 11, 2));
                result.setMinutes(Phorum.JSON.common.i(params, 14, 2));
                result.setSeconds(Phorum.JSON.common.i(params, 17, 2));
                result.setMonth(Phorum.JSON.common.i(params, 5, 2) - 1);
                result.setDate(Phorum.JSON.common.i(params, 9, 2));
                result.setFullYear(Phorum.JSON.common.i(params, 0, 4));
            };
            break;
        default:
            var n, tmp = [];
            if(result) {
                for(n in params) result[n] = params[n];
            } else {
                for(n in params) {
                    if(params.hasOwnProperty(n) && !!(result = Phorum.JSON.encode(params[n])))
                        tmp.push(Phorum.JSON.encode(n).concat(':', result));
                };
                result = '{'.concat(tmp.join(','), '}');
            };
            break;
    };
    return result;
}

Phorum.JSON.encode = function(params)
{
    var result = '';

    if(params === null)
    {
        result = 'null';
    }
    else if(!{'function':1,'undefined':1,'unknown':1}[typeof(params)])
    {
        switch(params.constructor)
        {
            case Array:
                for(var i = 0, j = params.length, tmp = []; i < j; i++) {
                    if(!!(result = Phorum.JSON.encode(params[i])))
                        tmp.push(result);
                };
                result = '['.concat(tmp.join(','), ']');
                break;

            case String:
                result = '"'.concat(params.replace(
                        /(\x5c|\x2F|\x22|[\x0c-\x0d]|[\x08-\x0a])/g, Phorum.JSON.common.s
                    ).replace(
                        /([\x00-\x07]|\x0b|[\x0e-\x1f])/g, Phorum.JSON.common.u
                    ), '"');
                break;

            default:
                result = Phorum.JSON.convert(params);
                break;
        };
    };
    return result;
};

Phorum.JSON.decode = function(json)
{
    eval('var res = '+json);
    if (res === undefined) {
        throw new SyntaxError('The Phorum JSON data cannot be parsed');
    }
    return res;
};



/* Added by module "editor_tools", file "mods/editor_tools/editor_tools.js" */
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
// Copyright (C) 2008  Phorum Development Team                               //
// http://www.phorum.org                                                     //
//                                                                           //
// This program is free software. You can redistribute it and/or modify      //
// it under the terms of either the current Phorum License (viewable at      //
// phorum.org) or the Phorum License that was distributed with this file     //
//                                                                           //
// This program is distributed in the hope that it will be useful,           //
// but WITHOUT ANY WARRANTY, without even the implied warranty of            //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                      //
//                                                                           //
// You should have received a copy of the Phorum License                     //
// along with this program.                                                  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

// Javascript code for the Phorum editor_tools module.

// Valid object ids for textarea objects to handle. The first object
// that can be matched will be use as the object to work with.
// This is done to arrange for backward compatibility between
// Phorum versions.
var editor_tools_textarea_ids = new Array(
    'phorum_textarea',  // Phorum 5.1
    'body',             // Phorum 5.2
    'message'           // PM interface
);

// Valid object ids for subject text field objects to handle.
var editor_tools_subject_ids = new Array(
    'phorum_subject',   // Phorum 5.1
    'subject'           // Phorum 5.2
);

// Storage for language translation strings from the Phorum language system.
var editor_tools_lang = new Array();

// Some variables for storing objects that we need globally.
var editor_tools_textarea_obj = null;
var editor_tools_subject_obj = null;
var editor_tools_help_picker_obj = null;

// A variable for storing the current selection range of the 
// textarea. Needed for working around an MSIE problem.
var editor_tools_textarea_range = null;

// A variable for storing all popup objects that we have, so we
// can hide them all at once.
var editor_tools_popup_objects = new Array();

// Storage for the tools that have to be added to the editor tools panel.
// The array value contains the following fields:
//
// 1) the id for the tool (must be unique)
// 2) a description to use as the tooltip title for the button
// 3) the icon image to display as a button.
// 4) the javascript action to run when the user clicks the button
// 5) optional: the width of the icon image
// 6) optional: the height of the icon image (presumed 20px by default)
//
// This array will be filled from PHP-generated javascript.
var editor_tools = new Array();

// Storage for help chapters that must be put under the editor tools
// help button. The array value contains the following fields:
//
// 1) a description that will be used as the clickable link text.
// 2) the url for the help page (absolute or relative to the Phorum dir).
//
// This array will be filled from PHP-generated javascript.
var editor_tools_help_chapters = new Array();

// The dimensions of the help window.
var editor_tools_help_width = '400px';
var editor_tools_help_height = '400px';

// The default height for our icons.
// This one is filled from PHP-generated javascript.
var editor_tools_default_iconheight;

// A simple browser check. We need to know the browser version, because
// the color picker won't work on at least MacOS MSIE 5.
var OLD_MSIE =
    navigator.userAgent.indexOf('MSIE')>=0 &&
    navigator.appVersion.replace(/.*MSIE (\d\.\d).*/g,'$1')/1 < 6;

// ----------------------------------------------------------------------
// Uitilty functions
// ----------------------------------------------------------------------

// Find the Phorum textarea object and return it. In case of
// problems, null will be returned.
function editor_tools_get_textarea()
{
    if (editor_tools_textarea_obj != null) {
        return editor_tools_textarea_obj;
    }

    for (var i=0; editor_tools_textarea_ids[i]; i++) {
        editor_tools_textarea_obj =
            document.getElementById(editor_tools_textarea_ids[i]);
        if (editor_tools_textarea_obj) break;
    }

    if (! editor_tools_textarea_obj) {
        alert('editor_tools.js library reports: ' +
              'no textarea found on the current page.');
        return null;
    }

    return editor_tools_textarea_obj;
}

// Find the Phorum subject field object and return it. In case of
// problems, null will be returned.
function editor_tools_get_subjectfield()
{
    if (editor_tools_subject_obj != null) {
        return editor_tools_subject_obj;
    }

    for (var i=0; editor_tools_subject_ids[i]; i++) {
        editor_tools_subject_obj =
            document.getElementById(editor_tools_subject_ids[i]);
        if (editor_tools_subject_obj) break;
    }

    if (! editor_tools_subject_obj) {
        return null;
    }

    return editor_tools_subject_obj;
}

// Return a translated string, based on the Phorum language system.
function editor_tools_translate(str)
{
    if (editor_tools_lang[str]) {
        return editor_tools_lang[str];
    } else {
        return str;
    }
}

// Strip whitespace from the start and end of a string.
function editor_tools_strip_whitespace(str, return_stripped)
{
    var strip_pre = '';
    var strip_post = '';

    // Strip whitespace from end of string.
    for (;;) {
        var lastchar = str.substring(str.length-1, str.length);
        if (lastchar == ' '  || lastchar == '\r' ||
            lastchar == '\n' || lastchar == '\t') {
            strip_post = lastchar + strip_post;

            str = str.substring(0, str.length-1);
        } else {
            break;
        }
    }

    // Strip whitespace from start of string.
    for (;;) {
        var firstchar = str.substring(0,1);
        if (firstchar == ' '  || firstchar == '\r' ||
            firstchar == '\n' || firstchar == '\t') {
            strip_pre += firstchar;
            str = str.substring(1);
        } else {
            break;
        }
    }

    if (return_stripped) {
        return new Array(str, strip_pre, strip_post);
    } else {
        return str;
    }
} 

// Close all popup windows and move the focus to the textarea.
function editor_tools_focus_textarea()
{
    var textarea_obj = editor_tools_get_textarea();
    if (textarea_obj == null) return;
    editor_tools_hide_all_popups();
    textarea_obj.focus();
}

// Close all popup windows and move the focus to the subject field.
function editor_tools_focus_subjectfield()
{
    var subjectfield_obj = editor_tools_get_subjectfield();
    if (subjectfield_obj == null) return;
    editor_tools_hide_all_popups();
    subjectfield_obj.focus();
}

// ----------------------------------------------------------------------
// Construction of the editor tools
// ----------------------------------------------------------------------

// Add the editor tools panel to the page.
function editor_tools_construct()
{
    var textarea_obj;
    var div_obj;
    var parent_obj;
    var a_obj;
    var img_obj;

    // If the browser does not support document.getElementById,
    // then the javascript code won't run. Do not display the
    // editor tools at all in that case.
    if (! document.getElementById) return;

    // No editor tools selected to display? Then we're done.
    if (editor_tools.length == 0) return;

    // Find the textarea and subject field object.
    textarea_obj = editor_tools_get_textarea();
    if (textarea_obj == null) return; // we consider this fatal.
    var subjectfield_obj = editor_tools_get_subjectfield();

    // Insert a <div> for containing the buttons, just before the textarea,
    // unless there is already an object with id "editor-tools". In that
    // case, the existing object is used instead.
    div_obj = document.getElementById('editor-tools');
    if (! div_obj) {
        parent_obj = textarea_obj.parentNode;
        div_obj = document.createElement('div');
        div_obj.id = 'editor-tools';
        parent_obj.insertBefore(div_obj, textarea_obj);
    }

    // Add the buttons to the new <div> for the editor tools.
    for (var i = 0; i < editor_tools.length; i++)
    {
        var toolinfo    = editor_tools[i];
        var tool        = toolinfo[0];
        var description = toolinfo[1];
        var icon        = toolinfo[2];
        var jsaction    = toolinfo[3];
        var iwidth      = toolinfo[4];
        var iheight     = toolinfo[5];
        var target      = toolinfo[6];

        // Do not use the color picker on MSIE 5. I tested this on a
        // Macintosh OS9 system and the color picker about hung MSIE.
        if (tool == 'color' && OLD_MSIE) continue;

        a_obj = document.createElement('a');
        a_obj.id = 'editor-tools-a-' + tool;
        a_obj.href = 'javascript:' + jsaction;

        img_obj = document.createElement('img');
        img_obj.id = 'editor-tools-img-' + tool;
        img_obj.className = 'editor-tools-button';
        img_obj.src = icon;
        img_obj.width = iwidth;
        img_obj.height = iheight;
        img_obj.style.padding = '2px';
        img_obj.alt = description;
	img_obj.title = description;

        // If an icon is added that is less high than our default icon
        // height, we try to make the button the same height as the
        // others by adding some dynamic padding to it.
        if (iheight < editor_tools_default_iconheight) {
            var fill = editor_tools_default_iconheight - iheight;
            var addbottom = Math.round(fill / 2);
            var addtop = fill - addbottom;
            img_obj.style.paddingTop = (addtop + 2) + 'px';
            img_obj.style.paddingBottom = (addbottom + 2) + 'px';
        }
        a_obj.appendChild(img_obj);

        // Add the button to the page.
        // target = subject is a feature that was added for supporting
        // the subjectsmiley tool. This one is added to the subject field
        // instead of the textarea. 
        if (target == 'subject') {
            // Find the subject text field. If we can't find one,
            // then simply ignore this tool.
            if (subjectfield_obj) {
                img_obj.style.verticalAlign = 'top';
                var parent = subjectfield_obj.parentNode;
                var sibling = subjectfield_obj.nextSibling;
                parent.insertBefore(a_obj, sibling);
            }
        } else {
            div_obj.appendChild(a_obj);
        }
    }

    // Hide any open popup when the user clicks the textarea or subject field.
    textarea_obj.onclick = function() {
        editor_tools_hide_all_popups();
    };
    if (subjectfield_obj) {
        subjectfield_obj.onclick = function() {
            editor_tools_hide_all_popups();
        }
    }
}

// ----------------------------------------------------------------------
// Popup window utilities
// ----------------------------------------------------------------------

// Create a popup window.
function editor_tools_construct_popup(create_id, anchor)
{
    // Create the outer div for the popup window.
    var popup_obj = document.createElement('div');
    popup_obj.id = create_id;
    popup_obj.className = 'editor-tools-popup';
    popup_obj.style.display = 'none';
    document.getElementById('editor-tools').appendChild(popup_obj);

    popup_obj._anchor = anchor;

    // Create the inner content div.
    var content_obj = document.createElement('div');
    content_obj.id = create_id + '-content';
    popup_obj.appendChild(content_obj);

    return new Array(popup_obj, content_obj);
}

// Toggle a popup window.
function editor_tools_toggle_popup(popup_obj, button_obj, width, leftoffset)
{
    // Determine where to show the popup on screen.
    var work_obj = button_obj;
    var top = work_obj.offsetTop + work_obj.offsetHeight + 2;
    var left = work_obj.offsetLeft;

    while (work_obj.offsetParent != null) {
        work_obj = work_obj.offsetParent;
        left += work_obj.offsetLeft;
        top += work_obj.offsetTop;
    }

    if (leftoffset) left -= leftoffset;
    if (width) popup_obj.style.width = width;

    // Move the popup window to the right place.
    if (popup_obj._anchor == 'r')
    {
        // Determine the screen width.
        var scrwidth = null;
        if (document.documentElement.clientWidth) {
            // Firefox screen width.
            scrwidth = document.documentElement.clientWidth;
        } else {
            scrwidth = document.body.clientWidth;
            // -16 for scrollbar that is counted in in some browsers.
            if (document.getElementById && !document.all) {
                scrwidth -= 16;
            }
        }

        var right = scrwidth - left - button_obj.offsetWidth;

        popup_obj.style.right = right + 'px';
        popup_obj.style.top = top + 'px';
    } else {
        popup_obj.style.left = left + 'px';
        popup_obj.style.top = top + 'px';
    }

    // Toggle the popup window's visibility.
    if (popup_obj.style.display == 'none') {
        editor_tools_hide_all_popups();
        popup_obj.style.display = 'block';
    } else {
        popup_obj.style.display = 'none';
        editor_tools_focus_textarea();
    }
}

// Register an object as a popup, so editor_tools_hide_all_popups() 
// can hide it.
function editor_tools_register_popup_object(object)
{
    if (! object) return;
    editor_tools_popup_objects[editor_tools_popup_objects.length] = object;
}

// Hide all objects that were registered as a popup.
function editor_tools_hide_all_popups()
{
    for (var i = 0; i < editor_tools_popup_objects.length; i++) {
        var object = editor_tools_popup_objects[i];
        object.style.display = 'none';
    }
}

// Save the selection range of the textarea. This is needed because
// sometimes clicking in a popup can clear the selection in MSIE.
function editor_tools_store_range()
{
    var ta = editor_tools_get_textarea();
    if (ta == null || ta.setSelectionRange || ! document.selection) return;
    ta.focus();
    editor_tools_textarea_range = document.selection.createRange();
}

// Restored a saved textarea selection range.
function editor_tools_restore_range()
{
    if (editor_tools_textarea_range != null)
    {
        editor_tools_textarea_range.select();
        editor_tools_textarea_range = null;
    }
}

// ----------------------------------------------------------------------
// Textarea manipulation
// ----------------------------------------------------------------------

// Add tags to the textarea. If some text is selected, then place the
// tags around the selected text. If no text is selected and a prompt_str
// is provided, then prompt the user for the data to place inside
// the tags.
function editor_tools_add_tags(pre, post, target, prompt_str)
{
    var text;
    var pretext;
    var posttext;
    var range;
    var ta = target ? target : editor_tools_get_textarea();
    if (ta == null) return;

    // Store the current scroll offset, so we can restore it after
    // adding the tags to its contents.
    var offset = ta.scrollTop;

    if (ta.setSelectionRange)
    {
        // Get the currently selected text.
        pretext = ta.value.substring(0, ta.selectionStart);
        text = ta.value.substring(ta.selectionStart, ta.selectionEnd);
        posttext = ta.value.substring(ta.selectionEnd, ta.value.length);

        // Prompt for input if no text was selected and a prompt is set.
        if (text == '' && prompt_str) {
            text = prompt(prompt_str, '');
            if (text == null) return;
        }

        // Strip whitespace from text selection and move it to the
        // pre- and post.
        var res = editor_tools_strip_whitespace(text, true);
        text = res[0];
        pre = res[1] + pre;
        post = post + res[2];

        ta.value = pretext + pre + text + post + posttext;

        // Reselect the selected text.
        var cursorpos1 = pretext.length + pre.length;
        var cursorpos2 = cursorpos1 + text.length;
        ta.setSelectionRange(cursorpos1, cursorpos2);
        ta.focus();
    }
    else if (document.selection) /* MSIE support */
    {
        // Get the currently selected text.
        ta.focus();
        range = document.selection.createRange();

        // Fumbling to work around newline selections at the end of
        // the text selection. MSIE does not include them in the
        // range.text, but it does replace them when setting range.text
        // to a new value :-/
        var virtlen = range.text.length;
        if (virtlen > 0) {
            while (range.text.length == virtlen) {
                range.moveEnd('character', -1);
            }
            range.moveEnd('character', +1);
        }

        // Prompt for input if no text was selected and a prompt is set.
        text = range.text;
        if (text == '' && prompt_str) {
            text = prompt(prompt_str, '');
            if (text == null) return;
        }

        // Strip whitespace from text selection and move it to the
        // pre- and post.
        var res = editor_tools_strip_whitespace(text, true);
        text = res[0];
        pre = res[1] + pre;
        post = post + res[2];

        // Add pre and post to the text.
        range.text = pre + text + post;

        // Reselect the selected text. Another MSIE anomaly has to be
        // taken care of here. MSIE will include carriage returns
        // in the text.length, but it does not take them into account
        // when using selection range moving methods :-/
        // By setting the range.text before, the cursor is now after
        // the replaced code, so we will move the start and the end
        // back in the text.
        var mvstart = post.length + text.length -
                      ((text + post).split('\r').length - 1);
        var mvend   = post.length +
                      (post.split('\r').length - 1);
        range.moveStart('character', -mvstart);
        range.moveEnd('character', -mvend);
        range.select();
    }
    else /* Support for really limited browsers, e.g. MSIE5 on MacOS */
    {
        ta.value = ta.value + pre + post;
    }

    ta.scrollTop = offset;
}

// ----------------------------------------------------------------------
// Tool: Help
// ----------------------------------------------------------------------

function editor_tools_handle_help()
{
    var c = editor_tools_help_chapters;

    // Shouldn't happen.
    if (c.length == 0) {
        alert('No help chapters available');
        return;
    }

    // Exactly one help chapter available. Immediately open the chapter.
    if (c.length == 1) {
        editor_tools_handle_help_select(c[0][1]);
        return;
    }

    // Multiple chapters available. Show a help picker menu with some
    // choices. Create the help picker on first access.
    if (!editor_tools_help_picker_obj)
    {
        // Create a new popup.
        var popup = editor_tools_construct_popup('editor-tools-help-picker','r');
        editor_tools_help_picker_obj = popup[0];
        var content_obj = popup[1];

        // Populate the new popup.
        for (var i = 0; i < editor_tools_help_chapters.length; i++) 
        {
            var helpinfo = editor_tools_help_chapters[i];
            var a_obj = document.createElement('a');
            a_obj.href = 'javascript:editor_tools_handle_help_select("' + helpinfo[1] + '")';
            a_obj.innerHTML = helpinfo[0];
            content_obj.appendChild(a_obj);
            content_obj.appendChild(document.createElement('br'));
        }

        // Register the popup with the editor tools.
        editor_tools_register_popup_object(editor_tools_help_picker_obj);
    }

    // Display the popup.
    var button_obj = document.getElementById('editor-tools-img-help');
    editor_tools_toggle_popup(editor_tools_help_picker_obj, button_obj);
}

function editor_tools_handle_help_select(url)
{
    var help_window = window.open(
        url,
        'editor_tools_help',
        'resizable=yes,' +
        'menubar=no,' +
        'directories=no,' +
        'scrollbars=yes,' +
        'toolbar=no,' +
        'status=no,' +
        'width=' + editor_tools_help_width + ',' +
        'height=' + editor_tools_help_height
    );

    editor_tools_focus_textarea();
    help_window.focus();
}



/* Added by module "smileys", file "mods/smileys/smileys_editor_tools.js.php" */
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
// Copyright (C) 2007  Phorum Development Team                               //
// http://www.phorum.org                                                     //
//                                                                           //
// This program is free software. You can redistribute it and/or modify      //
// it under the terms of either the current Phorum License (viewable at      //
// phorum.org) or the Phorum License that was distributed with this file     //
//                                                                           //
// This program is distributed in the hope that it will be useful,           //
// but WITHOUT ANY WARRANTY, without even the implied warranty of            //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                      //
//                                                                           //
// You should have received a copy of the Phorum License                     //
// along with this program.                                                  //
///////////////////////////////////////////////////////////////////////////////

// Javascript code for Smileys support in the Phorum editor_tools module.

// Some variables for storing objects that we need globally.
var editor_tools_smiley_picker_obj = null;
var editor_tools_subjectsmiley_picker_obj = null;

// Smileys for the smiley picker.
// *_s = search strings (smileys)
// *_r = replace strings (image urls)
var editor_tools_smileys = new Array();
var editor_tools_smileys_r = new Array();
var editor_tools_smileys_a = new Array();
var editor_tools_subjectsmileys = new Array();
var editor_tools_subjectsmileys_r = new Array();
var editor_tools_subjectsmileys_a = new Array();

// The width and offset to the left for the smiley picker popup menus.
// These values can be tweaked from the smiley module settings page.
var editor_tools_smileys_popupwidth = '150px';
var editor_tools_smileys_popupoffset = 0;
var editor_tools_subjectsmileys_popupwidth = '150px';
var editor_tools_subjectsmileys_popupoffset = 0;

// The available smileys.
editor_tools_smileys[0] = ':bannane';
editor_tools_smileys_r[0] = 'http://www.gobages.com/forum-mouche/smileys/Banane01.gif';
editor_tools_smileys_a[0] = '';
editor_tools_smileys[1] = ':pecheur';
editor_tools_smileys_r[1] = 'http://www.gobages.com/forum-mouche/smileys/Pecheur02.gif';
editor_tools_smileys_a[1] = '';
editor_tools_smileys[2] = ':welcome';
editor_tools_smileys_r[2] = 'http://www.gobages.com/forum-mouche/smileys/bienvenue.gif';
editor_tools_smileys_a[2] = '';
editor_tools_smileys[3] = ':neuneu';
editor_tools_smileys_r[3] = 'http://www.gobages.com/forum-mouche/smileys/neuneu.gif';
editor_tools_smileys_a[3] = '';
editor_tools_smileys[4] = ':noyade';
editor_tools_smileys_r[4] = 'http://www.gobages.com/forum-mouche/smileys/noyade.gif';
editor_tools_smileys_a[4] = '';
editor_tools_smileys[5] = ':requin';
editor_tools_smileys_r[5] = 'http://www.gobages.com/forum-mouche/smileys/Requin.gif';
editor_tools_smileys_a[5] = '';
editor_tools_smileys[6] = ':trampo';
editor_tools_smileys_r[6] = 'http://www.gobages.com/forum-mouche/smileys/trampo.gif';
editor_tools_smileys_a[6] = '';
editor_tools_smileys[7] = ':tubois';
editor_tools_smileys_r[7] = 'http://www.gobages.com/forum-mouche/smileys/tubois.gif';
editor_tools_smileys_a[7] = '';
editor_tools_smileys[8] = ':tusors';
editor_tools_smileys_r[8] = 'http://www.gobages.com/forum-mouche/smileys/tu-sors.gif';
editor_tools_smileys_a[8] = '';
editor_tools_smileys[9] = ':biere';
editor_tools_smileys_r[9] = 'http://www.gobages.com/forum-mouche/smileys/biere.gif';
editor_tools_smileys_a[9] = '';
editor_tools_smileys[10] = ':merci';
editor_tools_smileys_r[10] = 'http://www.gobages.com/forum-mouche/smileys/Merci.gif';
editor_tools_smileys_a[10] = '';
editor_tools_smileys[11] = ':nawak';
editor_tools_smileys_r[11] = 'http://www.gobages.com/forum-mouche/smileys/nawak.gif';
editor_tools_smileys_a[11] = '';
editor_tools_smileys[12] = ':phone';
editor_tools_smileys_r[12] = 'http://www.gobages.com/forum-mouche/smileys/Telephone.gif';
editor_tools_smileys_a[12] = '';
editor_tools_smileys[13] = ':poney';
editor_tools_smileys_r[13] = 'http://www.gobages.com/forum-mouche/smileys/poney.gif';
editor_tools_smileys_a[13] = '';
editor_tools_smileys[14] = ':vomis';
editor_tools_smileys_r[14] = 'http://www.gobages.com/forum-mouche/smileys/vomis.gif';
editor_tools_smileys_a[14] = '';
editor_tools_smileys[15] = ':anif';
editor_tools_smileys_r[15] = 'http://www.gobages.com/forum-mouche/smileys/anif.gif';
editor_tools_smileys_a[15] = '';
editor_tools_smileys[16] = ':atmb';
editor_tools_smileys_r[16] = 'http://www.gobages.com/forum-mouche/smileys/atmb.gif';
editor_tools_smileys_a[16] = '';
editor_tools_smileys[17] = ':blah';
editor_tools_smileys_r[17] = 'http://www.gobages.com/forum-mouche/smileys/BlahBlah05.gif';
editor_tools_smileys_a[17] = '';
editor_tools_smileys[18] = ':clap';
editor_tools_smileys_r[18] = 'http://www.gobages.com/forum-mouche/smileys/clap.gif';
editor_tools_smileys_a[18] = '';
editor_tools_smileys[19] = ':love';
editor_tools_smileys_r[19] = 'http://www.gobages.com/forum-mouche/smileys/bisou.gif';
editor_tools_smileys_a[19] = '';
editor_tools_smileys[20] = ':maso';
editor_tools_smileys_r[20] = 'http://www.gobages.com/forum-mouche/smileys/maso.gif';
editor_tools_smileys_a[20] = '';
editor_tools_smileys[21] = ':moto';
editor_tools_smileys_r[21] = 'http://www.gobages.com/forum-mouche/smileys/moto.gif';
editor_tools_smileys_a[21] = '';
editor_tools_smileys[22] = ':cop';
editor_tools_smileys_r[22] = 'http://www.gobages.com/forum-mouche/smileys/cop.gif';
editor_tools_smileys_a[22] = '';
editor_tools_smileys[23] = ':10';
editor_tools_smileys_r[23] = 'http://www.gobages.com/forum-mouche/smileys/10.gif';
editor_tools_smileys_a[23] = '';
editor_tools_smileys[24] = ':(';
editor_tools_smileys_r[24] = 'http://www.gobages.com/forum-mouche/smileys/smilie2.gif';
editor_tools_smileys_a[24] = 'sad smiley';
editor_tools_smileys[25] = ':)';
editor_tools_smileys_r[25] = 'http://www.gobages.com/forum-mouche/smileys/smilie1.gif';
editor_tools_smileys_a[25] = 'smiling smiley';
editor_tools_smileys[26] = ':0';
editor_tools_smileys_r[26] = 'http://www.gobages.com/forum-mouche/smileys/0.gif';
editor_tools_smileys_a[26] = '';
editor_tools_smileys[27] = ';)';
editor_tools_smileys_r[27] = 'http://www.gobages.com/forum-mouche/smileys/smilie3.gif';
editor_tools_smileys_a[27] = 'winking smiley';
editor_tools_smileys[28] = 'X(';
editor_tools_smileys_r[28] = 'http://www.gobages.com/forum-mouche/smileys/hot.gif';
editor_tools_smileys_a[28] = 'hot smiley';

// ----------------------------------------------------------------------
// Tool: smiley
// ----------------------------------------------------------------------

function editor_tools_handle_smiley()
{
    // Create the smiley picker on first access.
    if (!editor_tools_smiley_picker_obj)
    {
        // Create a new popup.
        var popup = editor_tools_construct_popup('editor-tools-smiley-picker','l');
        editor_tools_smiley_picker_obj = popup[0];
        var content_obj = popup[1];

        editor_tools_smiley_picker_obj.style.width = editor_tools_smileys_popupwidth;

        // Populate the new popup.
        for (var i = 0; i < editor_tools_smileys.length; i++)
        {
            var s = editor_tools_smileys[i];
            var r = editor_tools_smileys_r[i];
            var a = editor_tools_smileys_a[i];
            var a_obj = document.createElement('a');
            a_obj.href = 'javascript:editor_tools_handle_smiley_select("'+s+'")';
            var img_obj = document.createElement('img');
            img_obj.src = r;
            img_obj.title = a;
            img_obj.alt = a;
            a_obj.appendChild(img_obj);

            content_obj.appendChild(a_obj);
        }

        // Register the popup with the editor tools.
        editor_tools_register_popup_object(editor_tools_smiley_picker_obj);
    }

    // Display the popup.
    var button_obj = document.getElementById('editor-tools-img-smiley');
    editor_tools_toggle_popup(
        editor_tools_smiley_picker_obj,
        button_obj,
        editor_tools_smileys_popupwidth,
        editor_tools_smileys_popupoffset
    );
}

// Called by the smiley picker.
function editor_tools_handle_smiley_select(smiley)
{
    smiley = editor_tools_strip_whitespace(smiley);
    editor_tools_add_tags(smiley, '');
    editor_tools_focus_textarea();
}

function editor_tools_handle_subjectsmiley()
{
    // Create the smiley picker on first access.
    if (!editor_tools_subjectsmiley_picker_obj)
    {
        // Create a new popup.
        var popup = editor_tools_construct_popup('editor-tools-subjectsmiley-picker','l');
        editor_tools_subjectsmiley_picker_obj = popup[0];
        var content_obj = popup[1];

        // Populate the new popup.
        for (var i = 0; i < editor_tools_subjectsmileys.length; i++)
        {
            var s = editor_tools_subjectsmileys[i];
            var r = editor_tools_subjectsmileys_r[i];
            var a = editor_tools_subjectsmileys_a[i];

            var a_obj = document.createElement('a');
            a_obj.href = 'javascript:editor_tools_handle_subjectsmiley_select("'+s+'")';
            var img_obj = document.createElement('img');
            img_obj.src = r;
            img_obj.alt = a;
            img_obj.title = a;
            a_obj.appendChild(img_obj);
            content_obj.appendChild(a_obj);
        }

        // Register the popup with the editor tools.
        editor_tools_register_popup_object(editor_tools_subjectsmiley_picker_obj);
    }

    // Display the popup.
    var button_obj = document.getElementById('editor-tools-img-subjectsmiley');
    editor_tools_toggle_popup(
        editor_tools_subjectsmiley_picker_obj,
        button_obj,
        editor_tools_subjectsmileys_popupwidth,
        editor_tools_subjectsmileys_popupoffset
    );
}

// Called by the subject smiley picker.
function editor_tools_handle_subjectsmiley_select(smiley)
{
    smiley = editor_tools_strip_whitespace(smiley);
    editor_tools_add_tags(smiley, '', editor_tools_subject_obj);
    editor_tools_focus_subjectfield();
}

// ----------------------------------------------------------------------
// Tool: subject smiley
// ----------------------------------------------------------------------

function editor_tools_handle_subjectsmiley()
{
    // Create the smiley picker on first access.
    if (!editor_tools_subjectsmiley_picker_obj)
    {
        // Create a new popup.
        var popup = editor_tools_construct_popup('editor-tools-subjectsmiley-picker','l');
        editor_tools_subjectsmiley_picker_obj = popup[0];
        var content_obj = popup[1];

        // Populate the new popup.
        for (var i = 0; i < editor_tools_subjectsmileys.length; i++)
        {
            var s = editor_tools_subjectsmileys[i];
            var r = editor_tools_subjectsmileys_r[i];
            var a = editor_tools_subjectsmileys_a[i];

            var a_obj = document.createElement('a');
            a_obj.href = 'javascript:editor_tools_handle_subjectsmiley_select("'+s+'")';
            var img_obj = document.createElement('img');
            img_obj.src = r;
            img_obj.alt = a;
            img_obj.title = a;
            a_obj.appendChild(img_obj);
            content_obj.appendChild(a_obj);
        }

        // Register the popup with the editor tools.
        editor_tools_register_popup_object(editor_tools_subjectsmiley_picker_obj);
    }

    // Display the popup.
    var button_obj = document.getElementById('editor-tools-img-subjectsmiley');
    editor_tools_toggle_popup(
        editor_tools_subjectsmiley_picker_obj,
        button_obj,
        editor_tools_subjectsmileys_popupwidth,
        editor_tools_subjectsmileys_popupoffset
    );
}

// Called by the subject smiley picker.
function editor_tools_handle_subjectsmiley_select(smiley)
{
    smiley = editor_tools_strip_whitespace(smiley);
    editor_tools_add_tags(smiley, '', editor_tools_subject_obj);
    editor_tools_focus_subjectfield();
}



/* Added by module "embed_images", file "mods/embed_images/embed_images.js" */
function mod_embed_images_loadimage(viewer_id, thumbnail_url, fullimage_url, ajax_url, target_url, message_id, max_w, max_h, loading_txt, rescheduled)
{
    var container = document.getElementById('imagediv_'+viewer_id);
    if (!container) return;

    // If the image for the viewer id is already on the page, then we are
    // handling a cached thumbnail for which no Ajax magic is required,
    // but which is already loaded in the page. We'll only use this function
    // for setting up a full size image viewer.
    var image = document.getElementById('image_'+viewer_id);
    if (image)
    {
        // If a function was loaded for a viewer to initialize the
        // viewer, then hand over the image data to that function.
        // Don't do this in case we have a target_url.
        if (window.mod_embed_images_initviewer && !target_url) {
            var link  = document.getElementById('link_'+viewer_id);
            mod_embed_images_initviewer(
                container, image, link, fullimage_url, message_id
            );
        }

        return;
    }

    if (!rescheduled)
    {
        // We use a bit of a strange hack here, by checking for readyState.
        // This is not availble in all browsers. That's no problem though.
        // We mainly want MSIE to check it and to let it postpone image
        // loading till after the page is fully loaded. When doing things
        // earlier in MSIE from script code that is not a direct descendant
        // of <body>, we might get "operation aborted" errors.
        if (document.readyState &&
            document.readyState != 'loaded' &&
            document.readyState != 'complete' &&
            window.attachEvent &&
            !window.opera) {
          window.attachEvent('onload', function() {
              mod_embed_images_loadimage(
                  viewer_id, thumbnail_url, fullimage_url,
                  ajax_url, target_url, message_id,
                  max_w, max_h, loading_txt, true
              );
          });
          return;
        }

        // Display a "Loading ..." message to the user.
        container.innerHTML =
            '<div class="mod_embed_images_loading">' +
            loading_txt +
            '<\/div>';
    }

    // Create the XMLHttpRequest object that we can use to send an
    // Ajax request to the server.
    var xhr;
    if (window.XMLHttpRequest) {
        xhr = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        var versions = [
            "MSXML2.XMLHttp.5.0", "MSXML2.XMLHttp.4.0",
            "MSXML2.XMLHttp.3.0", "MSXML2.XMLHttp",
            "Microsoft.XMLHttp"
        ];
        for (var i=0; i < versions.length; i++)
          try { xhr = new ActiveXObject(versions[i]); } catch (e) { }
    }

    // No XMLHttpRequest object found? Fallback to a simpler way of
    // displaying the thumbnail image. This way we won't have
    // loading or error feedback and full size viewer support,
    // but at least we do show the image. This should't happen for
    // modern browsers.
    if (!xhr)
    {
        target.innerHTML =
            (target_url ? '<a href="'+target_url+'">' : '') +
            '<img id="image_'+viewer_id+'" src="'+thumbnail_url+'"/>' +
            (target_url ? '<\/a>' : '');
        return;
    }

    // Setup the XMLHttpRequest object for the request.
    xhr.open("get", ajax_url, true);
    xhr.setRequestHeader("Content-Type", "text/plain");
    xhr.onreadystatechange = function()
    {
        if (xhr.readyState == 4 && xhr.status == 200)
        {
            var res = xhr.responseText;

            // An "OK <w>x<h> <scw>x<sch>" message was returned.
            if (res.substr(0,2) == 'OK')
            {
                // Parse the respones message.
                // I know... a bit old school parsing.
                var dim   = res.substr(3);
                var xpos  = dim.indexOf('x');
                var spos  = dim.indexOf(' ');
                var origw = dim.substr(0,xpos);
                var origh = dim.substr(xpos+1, spos-xpos-1);
                    dim   = dim.substr(spos+1);
                    xpos  = dim.indexOf('x');
                var w     = dim.substr(0,xpos);
                var h     = dim.substr(xpos+1);

                var origsize  = origw+"x"+origh;
                var scalesize = w+"x"+h;
                var is_scaled = (origsize != scalesize);

                // Opera does not seem to load images that are not visible :(
                // So for those, we never get an onload event. Therefore,
                // we make the image 0x0 pixels and resize it to the real
                // size after loading.
                var html =
                    (target_url ? '<a href="'+target_url+'">' : '') +
                    '<img style="width:0px;height:0px" ' +
                    'id="image_'+viewer_id+'" ' +
                    'onload="' +
                    'mod_embed_images_image_loaded(this,'+w+','+h+')" ' +
                    'src="'+thumbnail_url+'"/>' +
                    (target_url ? '<\/a>' : '');

                container.innerHTML += html;

                // Go to extended viewer mode if the image was scaled down
                // or if a target URL was provided.
                if (is_scaled || target_url)
                {
                    var info = document.getElementById('info_'+viewer_id);
                    if (info) info.style.display = 'block';

                    var div = document.getElementById('div_'+viewer_id);
                    if (div) div.className = 'mod_embed_images_extended';
                }

                // If a function was loaded for a viewer to initialize the
                // viewer, then hand over the image data to that function.
                if (window.mod_embed_images_initviewer) {
                    var image = document.getElementById('image_'+viewer_id);
                    var link  = document.getElementById('link_'+viewer_id);
                    mod_embed_images_initviewer(
                        container, image, link, fullimage_url, message_id
                    );
                }
            }

            // Some error message was returned. Show the error to the user.
            else container.innerHTML =
                '<div class="mod_embed_images_error">' +
                '<strong>Image error<\/strong><br\/>' +
                res + '<br/>' +
                '<a href="' + fullimage_url + '">open image URL<\/a>' +
                '<\/div>';
        }
    }

    // Send the request to the server.
    xhr.send('');
}

function mod_embed_images_image_loaded(image, w, h)
{
    image.style.width = w+'px';
    image.style.height = h+'px';

    var container = image.parentNode;
    while (container.className != 'mod_embed_images_image') {
        container = container.parentNode;
        if (!container) return; // Should not happen.
    }

    container.style.width = image.width + 'px';
    container.parentNode.style.width = parseInt(image.width) + 'px';
    container.style.height = image.height + 'px';
    for (var i = 0; i < container.childNodes.length; i++) {
        if (container.childNodes[i].className == 'mod_embed_images_loading') {
            container.childNodes[i].style.display = 'none';
        }
    }
}



/* Added by module "embed_images/viewer:lightbox", file "mods/embed_images/viewers/lightbox/code/js/prototype.js" */
/*  Prototype JavaScript framework, version 1.4.0
 *  (c) 2005 Sam Stephenson <sam@conio.net>
 *
 *  THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff
 *  against the source tree, available from the Prototype darcs repository.
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *
 *  For details, see the Prototype web site: http://prototype.conio.net/
 *
/*--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.4.0',
  ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',

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

var Class = {
  create: function() {
    return function() {
      this.initialize.apply(this, arguments);
    }
  }
}

var Abstract = new Object();

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

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

Function.prototype.bind = function() {
  var __method = this, args = $A(arguments), object = args.shift();
  return function() {
    return __method.apply(object, args.concat($A(arguments)));
  }
}

Function.prototype.bindAsEventListener = function(object) {
  var __method = this;
  return function(event) {
    return __method.call(object, event || window.event);
  }
}

Object.extend(Number.prototype, {
  toColorPart: function() {
    var digits = this.toString(16);
    if (this < 16) return '0' + digits;
    return digits;
  },

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

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

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

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

    return returnValue;
  }
}

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

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

    this.registerCallback();
  },

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

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.callback();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
}

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

function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}
Object.extend(String.prototype, {
  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(eval);
  },

  escapeHTML: function() {
    var div = document.createElement('div');
    var text = document.createTextNode(this);
    div.appendChild(text);
    return div.innerHTML;
  },

  unescapeHTML: function() {
    var div = document.createElement('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? div.childNodes[0].nodeValue : '';
  },

  toQueryParams: function() {
    var pairs = this.match(/^\??(.*)$/)[1].split('&');
    return pairs.inject({}, function(params, pairString) {
      var pair = pairString.split('=');
      params[pair[0]] = pair[1];
      return params;
    });
  },

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

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

    var camelizedString = this.indexOf('-') == 0
      ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
      : oStringList[0];

    for (var i = 1, len = oStringList.length; i < len; i++) {
      var s = oStringList[i];
      camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
    }

    return camelizedString;
  },

  inspect: function() {
    return "'" + this.replace('\\', '\\\\').replace("'", '\\\'') + "'";
  }
});

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

var $break    = new Object();
var $continue = new Object();

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

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

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

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

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

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

  grep: function(pattern, iterator) {
    var results = [];
    this.each(function(value, index) {
      var stringValue = value.toString();
      if (stringValue.match(pattern))
        results.push((iterator || Prototype.K)(value, index));
    })
    return results;
  },

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

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

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

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

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

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

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

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

  sortBy: function(iterator) {
    return this.collect(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.collect(Prototype.K);
  },

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

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

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

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray
});
var $A = Array.from = function(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) {
    return iterable.toArray();
  } else {
    var results = [];
    for (var i = 0; i < iterable.length; i++)
      results.push(iterable[i]);
    return results;
  }
}

Object.extend(Array.prototype, Enumerable);

Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0; i < this.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 != undefined || value != null;
    });
  },

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(value.constructor == Array ?
        value.flatten() : [value]);
    });
  },

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

  indexOf: function(object) {
    for (var i = 0; i < this.length; i++)
      if (this[i] == object) return i;
    return -1;
  },

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

  shift: function() {
    var result = this[0];
    for (var i = 0; i < this.length - 1; i++)
      this[i] = this[i + 1];
    this.length--;
    return result;
  },

  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  }
});
var Hash = {
  _each: function(iterator) {
    for (key in this) {
      var value = this[key];
      if (typeof value == 'function') continue;

      var pair = [key, value];
      pair.key = key;
      pair.value = value;
      iterator(pair);
    }
  },

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

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

  merge: function(hash) {
    return $H(hash).inject($H(this), function(mergedHash, pair) {
      mergedHash[pair.key] = pair.value;
      return mergedHash;
    });
  },

  toQueryString: function() {
    return this.map(function(pair) {
      return pair.map(encodeURIComponent).join('=');
    }).join('&');
  },

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

function $H(object) {
  var hash = Object.extend({}, object || {});
  Object.extend(hash, Enumerable);
  Object.extend(hash, Hash);
  return hash;
}
ObjectRange = Class.create();
Object.extend(ObjectRange.prototype, Enumerable);
Object.extend(ObjectRange.prototype, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

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

  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 ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')},
      function() {return new XMLHttpRequest()}
    ) || false;
  },

  activeRequestCount: 0
}

Ajax.Responders = {
  responders: [],

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

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

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

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (responder[callback] && typeof responder[callback] == 'function') {
        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 = function() {};
Ajax.Base.prototype = {
  setOptions: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      parameters:   ''
    }
    Object.extend(this.options, options || {});
  },

  responseIsSuccess: function() {
    return this.transport.status == undefined
        || this.transport.status == 0
        || (this.transport.status >= 200 && this.transport.status < 300);
  },

  responseIsFailure: function() {
    return !this.responseIsSuccess();
  }
}

Ajax.Request = Class.create();
Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
  initialize: function(url, options) {
    this.transport = Ajax.getTransport();
    this.setOptions(options);
    this.request(url);
  },

  request: function(url) {
    var parameters = this.options.parameters || '';
    if (parameters.length > 0) parameters += '&_=';

    try {
      this.url = url;
      if (this.options.method == 'get' && parameters.length > 0)
        this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;

      Ajax.Responders.dispatch('onCreate', this, this.transport);

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

      if (this.options.asynchronous) {
        this.transport.onreadystatechange = this.onStateChange.bind(this);
        setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
      }

      this.setRequestHeaders();

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

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

  setRequestHeaders: function() {
    var requestHeaders =
      ['X-Requested-With', 'XMLHttpRequest',
       'X-Prototype-Version', Prototype.Version];

    if (this.options.method == 'post') {
      requestHeaders.push('Content-type',
        'application/x-www-form-urlencoded');

      /* Force "Connection: close" for Mozilla browsers to work around
       * a bug where XMLHttpReqeuest sends an incorrect Content-length
       * header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType)
        requestHeaders.push('Connection', 'close');
    }

    if (this.options.requestHeaders)
      requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);

    for (var i = 0; i < requestHeaders.length; i += 2)
      this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
  },

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

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

  evalJSON: function() {
    try {
      return eval(this.header('X-JSON'));
    } catch (e) {}
  },

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

  respondToReadyState: function(readyState) {
    var event = Ajax.Request.Events[readyState];
    var transport = this.transport, json = this.evalJSON();

    if (event == 'Complete') {
      try {
        (this.options['on' + this.transport.status]
         || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(transport, json);
      } catch (e) {
        this.dispatchException(e);
      }

      if ((this.header('Content-type') || '').match(/^text\/javascript/i))
        this.evalResponse();
    }

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

    /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
    if (event == 'Complete')
      this.transport.onreadystatechange = Prototype.emptyFunction;
  },

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

Ajax.Updater = Class.create();

Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
  initialize: function(container, url, options) {
    this.containers = {
      success: container.success ? $(container.success) : $(container),
      failure: container.failure ? $(container.failure) :
        (container.success ? null : $(container))
    }

    this.transport = Ajax.getTransport();
    this.setOptions(options);

    var onComplete = this.options.onComplete || Prototype.emptyFunction;
    this.options.onComplete = (function(transport, object) {
      this.updateContent();
      onComplete(transport, object);
    }).bind(this);

    this.request(url);
  },

  updateContent: function() {
    var receiver = this.responseIsSuccess() ?
      this.containers.success : this.containers.failure;
    var response = this.transport.responseText;

    if (!this.options.evalScripts)
      response = response.stripScripts();

    if (receiver) {
      if (this.options.insertion) {
        new this.options.insertion(receiver, response);
      } else {
        Element.update(receiver, response);
      }
    }

    if (this.responseIsSuccess()) {
      if (this.onComplete)
        setTimeout(this.onComplete.bind(this), 10);
    }
  }
});

Ajax.PeriodicalUpdater = Class.create();
Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
  initialize: function(container, url, options) {
    this.setOptions(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.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

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

      this.lastText = request.responseText;
    }
    this.timer = setTimeout(this.onTimerEvent.bind(this),
      this.decay * this.frequency * 1000);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
document.getElementsByClassName = function(className, parentElement) {
  var children = ($(parentElement) || document.body).getElementsByTagName('*');
  return $A(children).inject([], function(elements, child) {
    if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
      elements.push(child);
    return elements;
  });
}

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

if (!window.Element) {
  var Element = new Object();
}

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

  toggle: function() {
    for (var i = 0; i < arguments.length; i++) {
      var element = $(arguments[i]);
      Element[Element.visible(element) ? 'hide' : 'show'](element);
    }
  },

  hide: function() {
    for (var i = 0; i < arguments.length; i++) {
      var element = $(arguments[i]);
      element.style.display = 'none';
    }
  },

  show: function() {
    for (var i = 0; i < arguments.length; i++) {
      var element = $(arguments[i]);
      element.style.display = '';
    }
  },

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

  update: function(element, html) {
    $(element).innerHTML = html.stripScripts();
    setTimeout(function() {html.evalScripts()}, 10);
  },

  getHeight: function(element) {
    element = $(element);
    return element.offsetHeight;
  },

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

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    return Element.classNames(element).include(className);
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    return Element.classNames(element).add(className);
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    return Element.classNames(element).remove(className);
  },

  // removes whitespace-only text node children
  cleanWhitespace: function(element) {
    element = $(element);
    for (var i = 0; i < element.childNodes.length; i++) {
      var node = element.childNodes[i];
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        Element.remove(node);
    }
  },

  empty: function(element) {
    return $(element).innerHTML.match(/^\s*$/);
  },

  scrollTo: function(element) {
    element = $(element);
    var x = element.x ? element.x : element.offsetLeft,
        y = element.y ? element.y : element.offsetTop;
    window.scrollTo(x, y);
  },

  getStyle: function(element, style) {
    element = $(element);
    var value = element.style[style.camelize()];
    if (!value) {
      if (document.defaultView && document.defaultView.getComputedStyle) {
        var css = document.defaultView.getComputedStyle(element, null);
        value = css ? css.getPropertyValue(style) : null;
      } else if (element.currentStyle) {
        value = element.currentStyle[style.camelize()];
      }
    }

    if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
      if (Element.getStyle(element, 'position') == 'static') value = 'auto';

    return value == 'auto' ? null : value;
  },

  setStyle: function(element, style) {
    element = $(element);
    for (name in style)
      element.style[name.camelize()] = style[name];
  },

  getDimensions: function(element) {
    element = $(element);
    if (Element.getStyle(element, 'display') != 'none')
      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;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = '';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = 'none';
    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;
      }
    }
  },

  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 = '';
    }
  },

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

  undoClipping: function(element) {
    element = $(element);
    if (element._overflow) return;
    element.style.overflow = element._overflow;
    element._overflow = undefined;
  }
});

var Toggle = new Object();
Toggle.display = Element.toggle;

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

Abstract.Insertion = function(adjacency) {
  this.adjacency = adjacency;
}

Abstract.Insertion.prototype = {
  initialize: function(element, content) {
    this.element = $(element);
    this.content = content.stripScripts();

    if (this.adjacency && this.element.insertAdjacentHTML) {
      try {
        this.element.insertAdjacentHTML(this.adjacency, this.content);
      } catch (e) {
        if (this.element.tagName.toLowerCase() == 'tbody') {
          this.insertContent(this.contentFromAnonymousTable());
        } else {
          throw e;
        }
      }
    } else {
      this.range = this.element.ownerDocument.createRange();
      if (this.initializeRange) this.initializeRange();
      this.insertContent([this.range.createContextualFragment(this.content)]);
    }

    setTimeout(function() {content.evalScripts()}, 10);
  },

  contentFromAnonymousTable: function() {
    var div = document.createElement('div');
    div.innerHTML = '<table><tbody>' + this.content + '<\/tbody><\/table>';
    return $A(div.childNodes[0].childNodes[0].childNodes);
  }
}

var Insertion = new Object();

Insertion.Before = Class.create();
Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
  initializeRange: function() {
    this.range.setStartBefore(this.element);
  },

  insertContent: function(fragments) {
    fragments.each((function(fragment) {
      this.element.parentNode.insertBefore(fragment, this.element);
    }).bind(this));
  }
});

Insertion.Top = Class.create();
Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
  initializeRange: function() {
    this.range.selectNodeContents(this.element);
    this.range.collapse(true);
  },

  insertContent: function(fragments) {
    fragments.reverse(false).each((function(fragment) {
      this.element.insertBefore(fragment, this.element.firstChild);
    }).bind(this));
  }
});

Insertion.Bottom = Class.create();
Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
  initializeRange: function() {
    this.range.selectNodeContents(this.element);
    this.range.collapse(this.element);
  },

  insertContent: function(fragments) {
    fragments.each((function(fragment) {
      this.element.appendChild(fragment);
    }).bind(this));
  }
});

Insertion.After = Class.create();
Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
  initializeRange: function() {
    this.range.setStartAfter(this.element);
  },

  insertContent: function(fragments) {
    fragments.each((function(fragment) {
      this.element.parentNode.insertBefore(fragment,
        this.element.nextSibling);
    }).bind(this));
  }
});

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

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(this.toArray().concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set(this.select(function(className) {
      return className != classNameToRemove;
    }).join(' '));
  },

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

Object.extend(Element.ClassNames.prototype, Enumerable);
var Field = {
  clear: function() {
    for (var i = 0; i < arguments.length; i++)
      $(arguments[i]).value = '';
  },

  focus: function(element) {
    $(element).focus();
  },

  present: function() {
    for (var i = 0; i < arguments.length; i++)
      if ($(arguments[i]).value == '') return false;
    return true;
  },

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

  activate: function(element) {
    element = $(element);
    element.focus();
    if (element.select)
      element.select();
  }
}

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

var Form = {
  serialize: function(form) {
    var elements = Form.getElements($(form));
    var queryComponents = new Array();

    for (var i = 0; i < elements.length; i++) {
      var queryComponent = Form.Element.serialize(elements[i]);
      if (queryComponent)
        queryComponents.push(queryComponent);
    }

    return queryComponents.join('&');
  },

  getElements: function(form) {
    form = $(form);
    var elements = new Array();

    for (tagName in Form.Element.Serializers) {
      var tagElements = form.getElementsByTagName(tagName);
      for (var j = 0; j < tagElements.length; j++)
        elements.push(tagElements[j]);
    }
    return elements;
  },

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

    if (!typeName && !name)
      return inputs;

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

    return matchingInputs;
  },

  disable: function(form) {
    var elements = Form.getElements(form);
    for (var i = 0; i < elements.length; i++) {
      var element = elements[i];
      element.blur();
      element.disabled = 'true';
    }
  },

  enable: function(form) {
    var elements = Form.getElements(form);
    for (var i = 0; i < elements.length; i++) {
      var element = elements[i];
      element.disabled = '';
    }
  },

  findFirstElement: function(form) {
    return Form.getElements(form).find(function(element) {
      return element.type != 'hidden' && !element.disabled &&
        ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    Field.activate(Form.findFirstElement(form));
  },

  reset: function(form) {
    $(form).reset();
  }
}

Form.Element = {
  serialize: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    var parameter = Form.Element.Serializers[method](element);

    if (parameter) {
      var key = encodeURIComponent(parameter[0]);
      if (key.length == 0) return;

      if (parameter[1].constructor != Array)
        parameter[1] = [parameter[1]];

      return parameter[1].map(function(value) {
        return key + '=' + encodeURIComponent(value);
      }).join('&');
    }
  },

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

    if (parameter)
      return parameter[1];
  }
}

Form.Element.Serializers = {
  input: function(element) {
    switch (element.type.toLowerCase()) {
      case 'submit':
      case 'hidden':
      case 'password':
      case 'text':
        return Form.Element.Serializers.textarea(element);
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element);
    }
    return false;
  },

  inputSelector: function(element) {
    if (element.checked)
      return [element.name, element.value];
  },

  textarea: function(element) {
    return [element.name, element.value];
  },

  select: function(element) {
    return Form.Element.Serializers[element.type == 'select-one' ?
      'selectOne' : 'selectMany'](element);
  },

  selectOne: function(element) {
    var value = '', opt, index = element.selectedIndex;
    if (index >= 0) {
      opt = element.options[index];
      value = opt.value;
      if (!value && !('value' in opt))
        value = opt.text;
    }
    return [element.name, value];
  },

  selectMany: function(element) {
    var value = new Array();
    for (var i = 0; i < element.length; i++) {
      var opt = element.options[i];
      if (opt.selected) {
        var optValue = opt.value;
        if (!optValue && !('value' in opt))
          optValue = opt.text;
        value.push(optValue);
      }
    }
    return [element.name, value];
  }
}

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

var $F = Form.Element.getValue;

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

Abstract.TimedObserver = function() {}
Abstract.TimedObserver.prototype = {
  initialize: function(element, frequency, callback) {
    this.frequency = frequency;
    this.element   = $(element);
    this.callback  = callback;

    this.lastValue = this.getValue();
    this.registerCallback();
  },

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

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

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

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

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

Abstract.EventObserver = function() {}
Abstract.EventObserver.prototype = {
  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() {
    var elements = Form.getElements(this.element);
    for (var i = 0; i < elements.length; i++)
      this.registerCallback(elements[i]);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        case 'password':
        case 'text':
        case 'textarea':
        case 'select-one':
        case 'select-multiple':
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
}

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

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

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,

  element: function(event) {
    return event.target || event.srcElement;
  },

  isLeftClick: function(event) {
    return (((event.which) && (event.which == 1)) ||
            ((event.button) && (event.button == 1)));
  },

  pointerX: function(event) {
    return event.pageX || (event.clientX +
      (document.documentElement.scrollLeft || document.body.scrollLeft));
  },

  pointerY: function(event) {
    return event.pageY || (event.clientY +
      (document.documentElement.scrollTop || document.body.scrollTop));
  },

  stop: function(event) {
    if (event.preventDefault) {
      event.preventDefault();
      event.stopPropagation();
    } else {
      event.returnValue = false;
      event.cancelBubble = true;
    }
  },

  // find the first node with the given tagName, starting from the
  // node the event was triggered on; traverses the DOM upwards
  findElement: function(event, tagName) {
    var element = Event.element(event);
    while (element.parentNode && (!element.tagName ||
        (element.tagName.toUpperCase() != tagName.toUpperCase())))
      element = element.parentNode;
    return element;
  },

  observers: false,

  _observeAndCache: function(element, name, observer, useCapture) {
    if (!this.observers) this.observers = [];
    if (element.addEventListener) {
      this.observers.push([element, name, observer, useCapture]);
      element.addEventListener(name, observer, useCapture);
    } else if (element.attachEvent) {
      this.observers.push([element, name, observer, useCapture]);
      element.attachEvent('on' + name, observer);
    }
  },

  unloadCache: function() {
    if (!Event.observers) return;
    for (var i = 0; i < Event.observers.length; i++) {
      Event.stopObserving.apply(this, Event.observers[i]);
      Event.observers[i][0] = null;
    }
    Event.observers = false;
  },

  observe: function(element, name, observer, useCapture) {
    var element = $(element);
    useCapture = useCapture || false;

    if (name == 'keypress' &&
        (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
        || element.attachEvent))
      name = 'keydown';

    this._observeAndCache(element, name, observer, useCapture);
  },

  stopObserving: function(element, name, observer, useCapture) {
    var element = $(element);
    useCapture = useCapture || false;

    if (name == 'keypress' &&
        (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
        || element.detachEvent))
      name = 'keydown';

    if (element.removeEventListener) {
      element.removeEventListener(name, observer, useCapture);
    } else if (element.detachEvent) {
      element.detachEvent('on' + name, observer);
    }
  }
});

/* prevent memory leaks in IE */
Event.observe(window, 'unload', Event.unloadCache, false);
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;
  },

  realOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return [valueL, valueT];
  },

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

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        p = Element.getStyle(element, 'position');
        if (p == 'relative' || p == 'absolute') break;
      }
    } while (element);
    return [valueL, valueT];
  },

  offsetParent: 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;
  },

  // 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 = this.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 = this.realOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = this.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;
  },

  clone: function(source, target) {
    source = $(source);
    target = $(target);
    target.style.position = 'absolute';
    var offsets = this.cumulativeOffset(source);
    target.style.top    = offsets[1] + 'px';
    target.style.left   = offsets[0] + 'px';
    target.style.width  = source.offsetWidth + 'px';
    target.style.height = source.offsetHeight + 'px';
  },

  page: 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)
        if (Element.getStyle(element,'position')=='absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      valueT -= element.scrollTop  || 0;
      valueL -= element.scrollLeft || 0;
    } while (element = element.parentNode);

    return [valueL, valueT];
  },

  clone: function(source, target) {
    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 = Position.page(source);

    // find coordinate system to use
    target = $(target);
    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(target,'position') == 'absolute') {
      parent = Position.offsetParent(target);
      delta = Position.page(parent);
    }

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

  absolutize: function(element) {
    element = $(element);
    if (element.style.position == 'absolute') return;
    Position.prepare();

    var offsets = Position.positionedOffset(element);
    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';;
  },

  relativize: function(element) {
    element = $(element);
    if (element.style.position == 'relative') return;
    Position.prepare();

    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;
  }
}

// Safari returns margins on body which is incorrect if the child is absolutely
// positioned.  For performance reasons, redefine Position.cumulativeOffset for
// KHTML/WebKit only.
if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
  Position.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 [valueL, valueT];
  }
}


/* Added by module "embed_images/viewer:lightbox", file "mods/embed_images/viewers/lightbox/code/js/scriptaculous.js" */
// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

var Scriptaculous = {
  Version: '1.5.1',
  require: function(libraryName) {
    // inserting via DOM fails in Safari 2.0, so brute force approach
    document.write('<script type="text/javascript" src="'+libraryName+'"><\/script>');
  },
  load: function() {
    if((typeof Prototype=='undefined') ||
      parseFloat(Prototype.Version.split(".")[0] + "." +
                 Prototype.Version.split(".")[1]) < 1.4)
      throw("script.aculo.us requires the Prototype JavaScript framework >= 1.4.0");
    
    $A(document.getElementsByTagName("script")).findAll( function(s) {
      return (s.src && s.src.match(/scriptaculous\.js(\?.*)?$/))
    }).each( function(s) {
      var path = s.src.replace(/scriptaculous\.js(\?.*)?$/,'');
      var includes = s.src.match(/\?.*load=([a-z,]*)/);
      (includes ? includes[1] : 'builder,effects,dragdrop,controls,slider').split(',').each(
       function(include) { Scriptaculous.require(path+include+'.js') });
    });
  }
}

Scriptaculous.load();


/* Added by module "embed_images/viewer:lightbox", file "mods/embed_images/viewers/lightbox/code/js/effects.js" */
// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// See scriptaculous.js for full license.  

/* ------------- element ext -------------- */  
 
// converts rgb() and #xxx to #xxxxxx format,  
// returns self (or first argument) if not convertable  
String.prototype.parseColor = function() {  
  var color = '#';  
  if(this.slice(0,4) == 'rgb(') {  
    var cols = this.slice(4,this.length-1).split(',');  
    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
  } else {  
    if(this.slice(0,1) == '#') {  
      if(this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
      if(this.length==7) color = this.toLowerCase();  
    }  
  }  
  return(color.length==7 ? color : (arguments[0] || this));  
}

Element.collectTextNodes = function(element) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
  }).flatten().join('');
}

Element.collectTextNodesIgnoreClass = function(element, className) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
        Element.collectTextNodes(node) : ''));
  }).flatten().join('');
}

Element.setStyle = function(element, style) {
  element = $(element);
  for(k in style) element.style[k.camelize()] = style[k];
}

Element.setContentZoom = function(element, percent) {  
  Element.setStyle(element, {fontSize: (percent/100) + 'em'});   
  if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);  
}

Element.getOpacity = function(element){  
  var opacity;
  if (opacity = Element.getStyle(element, 'opacity'))  
    return parseFloat(opacity);  
  if (opacity = (Element.getStyle(element, 'filter') || '').match(/alpha\(opacity=(.*)\)/))  
    if(opacity[1]) return parseFloat(opacity[1]) / 100;  
  return 1.0;  
}

Element.setOpacity = function(element, value){  
  element= $(element);  
  if (value == 1){
    Element.setStyle(element, { opacity: 
      (/Gecko/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ? 
      0.999999 : null });
    if(/MSIE/.test(navigator.userAgent))  
      Element.setStyle(element, {filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'')});  
  } else {  
    if(value < 0.00001) value = 0;  
    Element.setStyle(element, {opacity: value});
    if(/MSIE/.test(navigator.userAgent))  
     Element.setStyle(element, 
       { filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'') +
                 'alpha(opacity='+value*100+')' });  
  }   
}  
 
Element.getInlineOpacity = function(element){  
  return $(element).style.opacity || '';
}  

Element.childrenWithClassName = function(element, className) {  
  return $A($(element).getElementsByTagName('*')).select(
    function(c) { return Element.hasClassName(c, className) });
}

Array.prototype.call = function() {
  var args = arguments;
  this.each(function(f){ f.apply(this, args) });
}

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

var Effect = {
  tagifyText: function(element) {
    var tagifyStyle = 'position:relative';
    if(/MSIE/.test(navigator.userAgent)) tagifyStyle += ';zoom:1';
    element = $(element);
    $A(element.childNodes).each( function(child) {
      if(child.nodeType==3) {
        child.nodeValue.toArray().each( function(character) {
          element.insertBefore(
            Builder.node('span',{style: tagifyStyle},
              character == ' ' ? String.fromCharCode(160) : character), 
              child);
        });
        Element.remove(child);
      }
    });
  },
  multiple: function(element, effect) {
    var elements;
    if(((typeof element == 'object') || 
        (typeof element == 'function')) && 
       (element.length))
      elements = element;
    else
      elements = $(element).childNodes;
      
    var options = Object.extend({
      speed: 0.1,
      delay: 0.0
    }, arguments[2] || {});
    var masterDelay = options.delay;

    $A(elements).each( function(element, index) {
      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
    });
  },
  PAIRS: {
    'slide':  ['SlideDown','SlideUp'],
    'blind':  ['BlindDown','BlindUp'],
    'appear': ['Appear','Fade']
  },
  toggle: function(element, effect) {
    element = $(element);
    effect = (effect || 'appear').toLowerCase();
    var options = Object.extend({
      queue: { position:'end', scope:(element.id || 'global') }
    }, arguments[2] || {});
    Effect[Element.visible(element) ? 
      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
  }
};

var Effect2 = Effect; // deprecated

/* ------------- transitions ------------- */

Effect.Transitions = {}

Effect.Transitions.linear = function(pos) {
  return pos;
}
Effect.Transitions.sinoidal = function(pos) {
  return (-Math.cos(pos*Math.PI)/2) + 0.5;
}
Effect.Transitions.reverse  = function(pos) {
  return 1-pos;
}
Effect.Transitions.flicker = function(pos) {
  return ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
}
Effect.Transitions.wobble = function(pos) {
  return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
}
Effect.Transitions.pulse = function(pos) {
  return (Math.floor(pos*10) % 2 == 0 ? 
    (pos*10-Math.floor(pos*10)) : 1-(pos*10-Math.floor(pos*10)));
}
Effect.Transitions.none = function(pos) {
  return 0;
}
Effect.Transitions.full = function(pos) {
  return 1;
}

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create();
Object.extend(Object.extend(Effect.ScopedQueue.prototype, Enumerable), {
  initialize: function() {
    this.effects  = [];
    this.interval = null;
  },
  _each: function(iterator) {
    this.effects._each(iterator);
  },
  add: function(effect) {
    var timestamp = new Date().getTime();
    
    var position = (typeof effect.options.queue == 'string') ? 
      effect.options.queue : effect.options.queue.position;
    
    switch(position) {
      case 'front':
        // move unstarted effects after this effect  
        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
            e.startOn  += effect.finishOn;
            e.finishOn += effect.finishOn;
          });
        break;
      case 'end':
        // start effect after last queued effect has finished
        timestamp = this.effects.pluck('finishOn').max() || timestamp;
        break;
    }
    
    effect.startOn  += timestamp;
    effect.finishOn += timestamp;
    this.effects.push(effect);
    if(!this.interval) 
      this.interval = setInterval(this.loop.bind(this), 40);
  },
  remove: function(effect) {
    this.effects = this.effects.reject(function(e) { return e==effect });
    if(this.effects.length == 0) {
      clearInterval(this.interval);
      this.interval = null;
    }
  },
  loop: function() {
    var timePos = new Date().getTime();
    this.effects.invoke('loop', timePos);
  }
});

Effect.Queues = {
  instances: $H(),
  get: function(queueName) {
    if(typeof queueName != 'string') return queueName;
    
    if(!this.instances[queueName])
      this.instances[queueName] = new Effect.ScopedQueue();
      
    return this.instances[queueName];
  }
}
Effect.Queue = Effect.Queues.get('global');

Effect.DefaultOptions = {
  transition: Effect.Transitions.sinoidal,
  duration:   1.0,   // seconds
  fps:        25.0,  // max. 25fps due to Effect.Queue implementation
  sync:       false, // true for combining
  from:       0.0,
  to:         1.0,
  delay:      0.0,
  queue:      'parallel'
}

Effect.Base = function() {};
Effect.Base.prototype = {
  position: null,
  start: function(options) {
    this.options      = Object.extend(Object.extend({},Effect.DefaultOptions), options || {});
    this.currentFrame = 0;
    this.state        = 'idle';
    this.startOn      = this.options.delay*1000;
    this.finishOn     = this.startOn + (this.options.duration*1000);
    this.event('beforeStart');
    if(!this.options.sync)
      Effect.Queues.get(typeof this.options.queue == 'string' ? 
        'global' : this.options.queue.scope).add(this);
  },
  loop: function(timePos) {
    if(timePos >= this.startOn) {
      if(timePos >= this.finishOn) {
        this.render(1.0);
        this.cancel();
        this.event('beforeFinish');
        if(this.finish) this.finish(); 
        this.event('afterFinish');
        return;  
      }
      var pos   = (timePos - this.startOn) / (this.finishOn - this.startOn);
      var frame = Math.round(pos * this.options.fps * this.options.duration);
      if(frame > this.currentFrame) {
        this.render(pos);
        this.currentFrame = frame;
      }
    }
  },
  render: function(pos) {
    if(this.state == 'idle') {
      this.state = 'running';
      this.event('beforeSetup');
      if(this.setup) this.setup();
      this.event('afterSetup');
    }
    if(this.state == 'running') {
      if(this.options.transition) pos = this.options.transition(pos);
      pos *= (this.options.to-this.options.from);
      pos += this.options.from;
      this.position = pos;
      this.event('beforeUpdate');
      if(this.update) this.update(pos);
      this.event('afterUpdate');
    }
  },
  cancel: function() {
    if(!this.options.sync)
      Effect.Queues.get(typeof this.options.queue == 'string' ? 
        'global' : this.options.queue.scope).remove(this);
    this.state = 'finished';
  },
  event: function(eventName) {
    if(this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
    if(this.options[eventName]) this.options[eventName](this);
  },
  inspect: function() {
    return '#<Effect:' + $H(this).inspect() + ',options:' + $H(this.options).inspect() + '>';
  }
}

Effect.Parallel = Class.create();
Object.extend(Object.extend(Effect.Parallel.prototype, Effect.Base.prototype), {
  initialize: function(effects) {
    this.effects = effects || [];
    this.start(arguments[1]);
  },
  update: function(position) {
    this.effects.invoke('render', position);
  },
  finish: function(position) {
    this.effects.each( function(effect) {
      effect.render(1.0);
      effect.cancel();
      effect.event('beforeFinish');
      if(effect.finish) effect.finish(position);
      effect.event('afterFinish');
    });
  }
});

Effect.Opacity = Class.create();
Object.extend(Object.extend(Effect.Opacity.prototype, Effect.Base.prototype), {
  initialize: function(element) {
    this.element = $(element);
    // make this work on IE on elements without 'layout'
    if(/MSIE/.test(navigator.userAgent) && (!this.element.hasLayout))
      Element.setStyle(this.element, {zoom: 1});
    var options = Object.extend({
      from: Element.getOpacity(this.element) || 0.0,
      to:   1.0
    }, arguments[1] || {});
    this.start(options);
  },
  update: function(position) {
    Element.setOpacity(this.element, position);
  }
});

Effect.Move = Class.create();
Object.extend(Object.extend(Effect.Move.prototype, Effect.Base.prototype), {
  initialize: function(element) {
    this.element = $(element);
    var options = Object.extend({
      x:    0,
      y:    0,
      mode: 'relative'
    }, arguments[1] || {});
    this.start(options);
  },
  setup: function() {
    // Bug in Opera: Opera returns the "real" position of a static element or
    // relative element that does not have top/left explicitly set.
    // ==> Always set top and left for position relative elements in your stylesheets 
    // (to 0 if you do not need them) 
    Element.makePositioned(this.element);
    this.originalLeft = parseFloat(Element.getStyle(this.element,'left') || '0');
    this.originalTop  = parseFloat(Element.getStyle(this.element,'top')  || '0');
    if(this.options.mode == 'absolute') {
      // absolute movement, so we need to calc deltaX and deltaY
      this.options.x = this.options.x - this.originalLeft;
      this.options.y = this.options.y - this.originalTop;
    }
  },
  update: function(position) {
    Element.setStyle(this.element, {
      left: this.options.x  * position + this.originalLeft + 'px',
      top:  this.options.y  * position + this.originalTop  + 'px'
    });
  }
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft) {
  return new Effect.Move(element, 
    Object.extend({ x: toLeft, y: toTop }, arguments[3] || {}));
};

Effect.Scale = Class.create();
Object.extend(Object.extend(Effect.Scale.prototype, Effect.Base.prototype), {
  initialize: function(element, percent) {
    this.element = $(element)
    var options = Object.extend({
      scaleX: true,
      scaleY: true,
      scaleContent: true,
      scaleFromCenter: false,
      scaleMode: 'box',        // 'box' or 'contents' or {} with provided values
      scaleFrom: 100.0,
      scaleTo:   percent
    }, arguments[2] || {});
    this.start(options);
  },
  setup: function() {
    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
    this.elementPositioning = Element.getStyle(this.element,'position');
    
    this.originalStyle = {};
    ['top','left','width','height','fontSize'].each( function(k) {
      this.originalStyle[k] = this.element.style[k];
    }.bind(this));
      
    this.originalTop  = this.element.offsetTop;
    this.originalLeft = this.element.offsetLeft;
    
    var fontSize = Element.getStyle(this.element,'font-size') || '100%';
    ['em','px','%'].each( function(fontSizeType) {
      if(fontSize.indexOf(fontSizeType)>0) {
        this.fontSize     = parseFloat(fontSize);
        this.fontSizeType = fontSizeType;
      }
    }.bind(this));
    
    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
    
    this.dims = null;
    if(this.options.scaleMode=='box')
      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
    if(/^content/.test(this.options.scaleMode))
      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
    if(!this.dims)
      this.dims = [this.options.scaleMode.originalHeight,
                   this.options.scaleMode.originalWidth];
  },
  update: function(position) {
    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
    if(this.options.scaleContent && this.fontSize)
      Element.setStyle(this.element, {fontSize: this.fontSize * currentScale + this.fontSizeType });
    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
  },
  finish: function(position) {
    if (this.restoreAfterFinish) Element.setStyle(this.element, this.originalStyle);
  },
  setDimensions: function(height, width) {
    var d = {};
    if(this.options.scaleX) d.width = width + 'px';
    if(this.options.scaleY) d.height = height + 'px';
    if(this.options.scaleFromCenter) {
      var topd  = (height - this.dims[0])/2;
      var leftd = (width  - this.dims[1])/2;
      if(this.elementPositioning == 'absolute') {
        if(this.options.scaleY) d.top = this.originalTop-topd + 'px';
        if(this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
      } else {
        if(this.options.scaleY) d.top = -topd + 'px';
        if(this.options.scaleX) d.left = -leftd + 'px';
      }
    }
    Element.setStyle(this.element, d);
  }
});

Effect.Highlight = Class.create();
Object.extend(Object.extend(Effect.Highlight.prototype, Effect.Base.prototype), {
  initialize: function(element) {
    this.element = $(element);
    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || {});
    this.start(options);
  },
  setup: function() {
    // Prevent executing on elements not in the layout flow
    if(Element.getStyle(this.element, 'display')=='none') { this.cancel(); return; }
    // Disable background image during the effect
    this.oldStyle = {
      backgroundImage: Element.getStyle(this.element, 'background-image') };
    Element.setStyle(this.element, {backgroundImage: 'none'});
    if(!this.options.endcolor)
      this.options.endcolor = Element.getStyle(this.element, 'background-color').parseColor('#ffffff');
    if(!this.options.restorecolor)
      this.options.restorecolor = Element.getStyle(this.element, 'background-color');
    // init color calculations
    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
    this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
  },
  update: function(position) {
    Element.setStyle(this.element,{backgroundColor: $R(0,2).inject('#',function(m,v,i){
      return m+(Math.round(this._base[i]+(this._delta[i]*position)).toColorPart()); }.bind(this)) });
  },
  finish: function() {
    Element.setStyle(this.element, Object.extend(this.oldStyle, {
      backgroundColor: this.options.restorecolor
    }));
  }
});

Effect.ScrollTo = Class.create();
Object.extend(Object.extend(Effect.ScrollTo.prototype, Effect.Base.prototype), {
  initialize: function(element) {
    this.element = $(element);
    this.start(arguments[1] || {});
  },
  setup: function() {
    Position.prepare();
    var offsets = Position.cumulativeOffset(this.element);
    if(this.options.offset) offsets[1] += this.options.offset;
    var max = window.innerHeight ? 
      window.height - window.innerHeight :
      document.body.scrollHeight - 
        (document.documentElement.clientHeight ? 
          document.documentElement.clientHeight : document.body.clientHeight);
    this.scrollStart = Position.deltaY;
    this.delta = (offsets[1] > max ? max : offsets[1]) - this.scrollStart;
  },
  update: function(position) {
    Position.prepare();
    window.scrollTo(Position.deltaX, 
      this.scrollStart + (position*this.delta));
  }
});

/* ------------- combination effects ------------- */

Effect.Fade = function(element) {
  var oldOpacity = Element.getInlineOpacity(element);
  var options = Object.extend({
  from: Element.getOpacity(element) || 1.0,
  to:   0.0,
  afterFinishInternal: function(effect) { with(Element) { 
    if(effect.options.to!=0) return;
    hide(effect.element);
    setStyle(effect.element, {opacity: oldOpacity}); }}
  }, arguments[1] || {});
  return new Effect.Opacity(element,options);
}

Effect.Appear = function(element) {
  var options = Object.extend({
  from: (Element.getStyle(element, 'display') == 'none' ? 0.0 : Element.getOpacity(element) || 0.0),
  to:   1.0,
  beforeSetup: function(effect) { with(Element) {
    setOpacity(effect.element, effect.options.from);
    show(effect.element); }}
  }, arguments[1] || {});
  return new Effect.Opacity(element,options);
}

Effect.Puff = function(element) {
  element = $(element);
  var oldStyle = { opacity: Element.getInlineOpacity(element), position: Element.getStyle(element, 'position') };
  return new Effect.Parallel(
   [ new Effect.Scale(element, 200, 
      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
     Object.extend({ duration: 1.0, 
      beforeSetupInternal: function(effect) { with(Element) {
        setStyle(effect.effects[0].element, {position: 'absolute'}); }},
      afterFinishInternal: function(effect) { with(Element) {
         hide(effect.effects[0].element);
         setStyle(effect.effects[0].element, oldStyle); }}
     }, arguments[1] || {})
   );
}

Effect.BlindUp = function(element) {
  element = $(element);
  Element.makeClipping(element);
  return new Effect.Scale(element, 0, 
    Object.extend({ scaleContent: false, 
      scaleX: false, 
      restoreAfterFinish: true,
      afterFinishInternal: function(effect) { with(Element) {
        [hide, undoClipping].call(effect.element); }} 
    }, arguments[1] || {})
  );
}

Effect.BlindDown = function(element) {
  element = $(element);
  var oldHeight = Element.getStyle(element, 'height');
  var elementDimensions = Element.getDimensions(element);
  return new Effect.Scale(element, 100, 
    Object.extend({ scaleContent: false, 
      scaleX: false,
      scaleFrom: 0,
      scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
      restoreAfterFinish: true,
      afterSetup: function(effect) { with(Element) {
        makeClipping(effect.element);
        setStyle(effect.element, {height: '0px'});
        show(effect.element); 
      }},  
      afterFinishInternal: function(effect) { with(Element) {
        undoClipping(effect.element);
        setStyle(effect.element, {height: oldHeight});
      }}
    }, arguments[1] || {})
  );
}

Effect.SwitchOff = function(element) {
  element = $(element);
  var oldOpacity = Element.getInlineOpacity(element);
  return new Effect.Appear(element, { 
    duration: 0.4,
    from: 0,
    transition: Effect.Transitions.flicker,
    afterFinishInternal: function(effect) {
      new Effect.Scale(effect.element, 1, { 
        duration: 0.3, scaleFromCenter: true,
        scaleX: false, scaleContent: false, restoreAfterFinish: true,
        beforeSetup: function(effect) { with(Element) {
          [makePositioned,makeClipping].call(effect.element);
        }},
        afterFinishInternal: function(effect) { with(Element) {
          [hide,undoClipping,undoPositioned].call(effect.element);
          setStyle(effect.element, {opacity: oldOpacity});
        }}
      })
    }
  });
}

Effect.DropOut = function(element) {
  element = $(element);
  var oldStyle = {
    top: Element.getStyle(element, 'top'),
    left: Element.getStyle(element, 'left'),
    opacity: Element.getInlineOpacity(element) };
  return new Effect.Parallel(
    [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
    Object.extend(
      { duration: 0.5,
        beforeSetup: function(effect) { with(Element) {
          makePositioned(effect.effects[0].element); }},
        afterFinishInternal: function(effect) { with(Element) {
          [hide, undoPositioned].call(effect.effects[0].element);
          setStyle(effect.effects[0].element, oldStyle); }} 
      }, arguments[1] || {}));
}

Effect.Shake = function(element) {
  element = $(element);
  var oldStyle = {
    top: Element.getStyle(element, 'top'),
    left: Element.getStyle(element, 'left') };
	  return new Effect.Move(element, 
	    { x:  20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
	  new Effect.Move(effect.element,
	    { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
	  new Effect.Move(effect.element,
	    { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
	  new Effect.Move(effect.element,
	    { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
	  new Effect.Move(effect.element,
	    { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
	  new Effect.Move(effect.element,
	    { x: -20, y: 0, duration: 0.05, afterFinishInternal: function(effect) { with(Element) {
        undoPositioned(effect.element);
        setStyle(effect.element, oldStyle);
  }}}) }}) }}) }}) }}) }});
}

Effect.SlideDown = function(element) {
  element = $(element);
  Element.cleanWhitespace(element);
  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
  var oldInnerBottom = Element.getStyle(element.firstChild, 'bottom');
  var elementDimensions = Element.getDimensions(element);
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false, 
    scaleFrom: 0,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) { with(Element) {
      makePositioned(effect.element);
      makePositioned(effect.element.firstChild);
      if(window.opera) setStyle(effect.element, {top: ''});
      makeClipping(effect.element);
      setStyle(effect.element, {height: '0px'});
      show(element); }},
    afterUpdateInternal: function(effect) { with(Element) {
      setStyle(effect.element.firstChild, {bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' }); }},
    afterFinishInternal: function(effect) { with(Element) {
      undoClipping(effect.element); 
      undoPositioned(effect.element.firstChild);
      undoPositioned(effect.element);
      setStyle(effect.element.firstChild, {bottom: oldInnerBottom}); }}
    }, arguments[1] || {})
  );
}
  
Effect.SlideUp = function(element) {
  element = $(element);
  Element.cleanWhitespace(element);
  var oldInnerBottom = Element.getStyle(element.firstChild, 'bottom');
  return new Effect.Scale(element, 0, 
   Object.extend({ scaleContent: false, 
    scaleX: false, 
    scaleMode: 'box',
    scaleFrom: 100,
    restoreAfterFinish: true,
    beforeStartInternal: function(effect) { with(Element) {
      makePositioned(effect.element);
      makePositioned(effect.element.firstChild);
      if(window.opera) setStyle(effect.element, {top: ''});
      makeClipping(effect.element);
      show(element); }},  
    afterUpdateInternal: function(effect) { with(Element) {
      setStyle(effect.element.firstChild, {bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' }); }},
    afterFinishInternal: function(effect) { with(Element) {
        [hide, undoClipping].call(effect.element); 
        undoPositioned(effect.element.firstChild);
        undoPositioned(effect.element);
        setStyle(effect.element.firstChild, {bottom: oldInnerBottom}); }}
   }, arguments[1] || {})
  );
}

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element) {
  return new Effect.Scale(element, window.opera ? 1 : 0, 
    { restoreAfterFinish: true,
      beforeSetup: function(effect) { with(Element) {
        makeClipping(effect.element); }},  
      afterFinishInternal: function(effect) { with(Element) {
        hide(effect.element); 
        undoClipping(effect.element); }}
  });
}

Effect.Grow = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransistion: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.full
  }, arguments[1] || {});
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: Element.getInlineOpacity(element) };

  var dims = Element.getDimensions(element);    
  var initialMoveX, initialMoveY;
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      initialMoveX = initialMoveY = moveX = moveY = 0; 
      break;
    case 'top-right':
      initialMoveX = dims.width;
      initialMoveY = moveY = 0;
      moveX = -dims.width;
      break;
    case 'bottom-left':
      initialMoveX = moveX = 0;
      initialMoveY = dims.height;
      moveY = -dims.height;
      break;
    case 'bottom-right':
      initialMoveX = dims.width;
      initialMoveY = dims.height;
      moveX = -dims.width;
      moveY = -dims.height;
      break;
    case 'center':
      initialMoveX = dims.width / 2;
      initialMoveY = dims.height / 2;
      moveX = -dims.width / 2;
      moveY = -dims.height / 2;
      break;
  }
  
  return new Effect.Move(element, {
    x: initialMoveX,
    y: initialMoveY,
    duration: 0.01, 
    beforeSetup: function(effect) { with(Element) {
      hide(effect.element);
      makeClipping(effect.element);
      makePositioned(effect.element);
    }},
    afterFinishInternal: function(effect) {
      new Effect.Parallel(
        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
          new Effect.Scale(effect.element, 100, {
            scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
        ], Object.extend({
             beforeSetup: function(effect) { with(Element) {
               setStyle(effect.effects[0].element, {height: '0px'});
               show(effect.effects[0].element); }},
             afterFinishInternal: function(effect) { with(Element) {
               [undoClipping, undoPositioned].call(effect.effects[0].element); 
               setStyle(effect.effects[0].element, oldStyle); }}
           }, options)
      )
    }
  });
}

Effect.Shrink = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransistion: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.none
  }, arguments[1] || {});
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: Element.getInlineOpacity(element) };

  var dims = Element.getDimensions(element);
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      moveX = moveY = 0;
      break;
    case 'top-right':
      moveX = dims.width;
      moveY = 0;
      break;
    case 'bottom-left':
      moveX = 0;
      moveY = dims.height;
      break;
    case 'bottom-right':
      moveX = dims.width;
      moveY = dims.height;
      break;
    case 'center':  
      moveX = dims.width / 2;
      moveY = dims.height / 2;
      break;
  }