// MediaWiki JavaScript support functions

var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var is_gecko = ((clientPC.indexOf('gecko')!=-1) && (clientPC.indexOf('spoofer')==-1)
                && (clientPC.indexOf('khtml') == -1) && (clientPC.indexOf('netscape/7.0')==-1));
var is_safari = ((clientPC.indexOf('applewebkit')!=-1) && (clientPC.indexOf('spoofer')==-1));
var is_khtml = (navigator.vendor == 'KDE' || ( document.childNodes && !document.all && !navigator.taintEnabled ));
// For accesskeys
var is_ff2_win = (clientPC.indexOf('firefox/2')!=-1 || clientPC.indexOf('minefield/3')!=-1) && clientPC.indexOf('windows')!=-1;
var is_ff2_x11 = (clientPC.indexOf('firefox/2')!=-1 || clientPC.indexOf('minefield/3')!=-1) && clientPC.indexOf('x11')!=-1;
if (clientPC.indexOf('opera') != -1) {
    var is_opera = true;
    var is_opera_preseven = (window.opera && !document.childNodes);
    var is_opera_seven = (window.opera && document.childNodes);
}

// Global external objects used by this script.
/*extern ta, stylepath, skin */

// add any onload functions in this hook (please don't hard-code any events in the xhtml source)
var doneOnloadHook;

if (!window.onloadFuncts) {
    var onloadFuncts = [];
}

function addOnloadHook(hookFunct) {
    // Allows add-on scripts to add onload functions
    onloadFuncts[onloadFuncts.length] = hookFunct;
}

function hookEvent(hookName, hookFunct) {
    if (window.addEventListener) {
        window.addEventListener(hookName, hookFunct, false);
    } else if (window.attachEvent) {
        window.attachEvent("on" + hookName, hookFunct);
    }
}

// document.write special stylesheet links
if (typeof stylepath != 'undefined' && typeof skin != 'undefined') {
    if (is_opera_preseven) {
        document.write('<link rel="stylesheet" type="text/css" href="'+stylepath+'/'+skin+'/Opera6Fixes.css">');
    } else if (is_opera_seven) {
        document.write('<link rel="stylesheet" type="text/css" href="'+stylepath+'/'+skin+'/Opera7Fixes.css">');
    } else if (is_khtml) {
        document.write('<link rel="stylesheet" type="text/css" href="'+stylepath+'/'+skin+'/KHTMLFixes.css">');
    }
}


//if (wgBreakFrames) {
    // Un-trap us from framesets
//    if (window.top != window) {
//        window.top.location = window.location;
//    }
//}

// for enhanced RecentChanges
function toggleVisibility(_levelId, _otherId, _linkId) {
    var thisLevel = document.getElementById(_levelId);
    var otherLevel = document.getElementById(_otherId);
    var linkLevel = document.getElementById(_linkId);
    if (thisLevel.style.display == 'none') {
        thisLevel.style.display = 'block';
        otherLevel.style.display = 'none';
        linkLevel.style.display = 'inline';
    } else {
        thisLevel.style.display = 'none';
        otherLevel.style.display = 'inline';
        linkLevel.style.display = 'none';
    }
}

function historyRadios(parent) {
    var inputs = parent.getElementsByTagName('input');
    var radios = [];
    for (var i = 0; i < inputs.length; i++) {
        if (inputs[i].name == "diff" || inputs[i].name == "oldid") {
            radios[radios.length] = inputs[i];
        }
    }
    return radios;
}

// check selection and tweak visibility/class onclick
function diffcheck() {
    var dli = false; // the li where the diff radio is checked
    var oli = false; // the li where the oldid radio is checked
    var hf = document.getElementById('pagehistory');
    if (!hf) {
        return true;
    }
    var lis = hf.getElementsByTagName('li');
    for (var i=0;i<lis.length;i++) {
        var inputs = historyRadios(lis[i]);
        if (inputs[1] && inputs[0]) {
            if (inputs[1].checked || inputs[0].checked) { // this row has a checked radio button
                if (inputs[1].checked && inputs[0].checked && inputs[0].value == inputs[1].value) {
                    return false;
                }
                if (oli) { // it's the second checked radio
                    if (inputs[1].checked) {
                        oli.className = "selected";
                        return false;
                    }
                } else if (inputs[0].checked) {
                    return false;
                }
                if (inputs[0].checked) {
                    dli = lis[i];
                }
                if (!oli) {
                    inputs[0].style.visibility = 'hidden';
                }
                if (dli) {
                    inputs[1].style.visibility = 'hidden';
                }
                lis[i].className = "selected";
                oli = lis[i];
            }  else { // no radio is checked in this row
                if (!oli) {
                    inputs[0].style.visibility = 'hidden';
                } else {
                    inputs[0].style.visibility = 'visible';
                }
                if (dli) {
                    inputs[1].style.visibility = 'hidden';
                } else {
                    inputs[1].style.visibility = 'visible';
                }
                lis[i].className = "";
            }
        }
    }
    return true;
}

// page history stuff
// attach event handlers to the input elements on history page
function histrowinit() {
    var hf = document.getElementById('pagehistory');
    if (!hf) {
        return;
    }
    var lis = hf.getElementsByTagName('li');
    for (var i = 0; i < lis.length; i++) {
        var inputs = historyRadios(lis[i]);
        if (inputs[0] && inputs[1]) {
            inputs[0].onclick = diffcheck;
            inputs[1].onclick = diffcheck;
        }
    }
    diffcheck();
}

// generate toc from prefs form, fold sections
// XXX: needs testing on IE/Mac and safari
// more comments to follow
function tabbedprefs() {
    var prefform = document.getElementById('preferences');
    if (!prefform || !document.createElement) {
        return;
    }
    if (prefform.nodeName.toLowerCase() == 'a') {
        return; // Occasional IE problem
    }
    prefform.className = prefform.className + 'jsprefs';
    var sections = [];
    var children = prefform.childNodes;
    var seci = 0;
    for (var i = 0; i < children.length; i++) {
        if (children[i].nodeName.toLowerCase() == 'fieldset') {
            children[i].id = 'prefsection-' + seci;
            children[i].className = 'prefsection';
            if (is_opera || is_khtml) {
                children[i].className = 'prefsection operaprefsection';
            }
            var legends = children[i].getElementsByTagName('legend');
            sections[seci] = {};
            legends[0].className = 'mainLegend';
            if (legends[0] && legends[0].firstChild.nodeValue) {
                sections[seci].text = legends[0].firstChild.nodeValue;
            } else {
                sections[seci].text = '# ' + seci;
            }
            sections[seci].secid = children[i].id;
            seci++;
            if (sections.length != 1) {
                children[i].style.display = 'none';
            } else {
                var selectedid = children[i].id;
            }
        }
    }
    var toc = document.createElement('ul');
    toc.id = 'preftoc';
    toc.selectedid = selectedid;
    for (i = 0; i < sections.length; i++) {
        var li = document.createElement('li');
        if (i === 0) {
            li.className = 'selected';
        }
        var a = document.createElement('a');
        a.href = '#' + sections[i].secid;
        a.onmousedown = a.onclick = uncoversection;
        a.appendChild(document.createTextNode(sections[i].text));
        a.secid = sections[i].secid;
        li.appendChild(a);
        toc.appendChild(li);
    }
    prefform.parentNode.insertBefore(toc, prefform.parentNode.childNodes[0]);
    document.getElementById('prefsubmit').id = 'prefcontrol';
}

function uncoversection() {
    var oldsecid = this.parentNode.parentNode.selectedid;
    var newsec = document.getElementById(this.secid);
    if (oldsecid != this.secid) {
        var ul = document.getElementById('preftoc');
        document.getElementById(oldsecid).style.display = 'none';
        newsec.style.display = 'block';
        ul.selectedid = this.secid;
        var lis = ul.getElementsByTagName('li');
        for (var i = 0; i< lis.length; i++) {
            lis[i].className = '';
        }
        this.parentNode.className = 'selected';
    }
    return false;
}

// Timezone stuff
// tz in format [+-]HHMM
function checkTimezone(tz, msg) {
    var localclock = new Date();
    // returns negative offset from GMT in minutes
    var tzRaw = localclock.getTimezoneOffset();
    var tzHour = Math.floor( Math.abs(tzRaw) / 60);
    var tzMin = Math.abs(tzRaw) % 60;
    var tzString = ((tzRaw >= 0) ? "-" : "+") + ((tzHour < 10) ? "0" : "") + tzHour + ((tzMin < 10) ? "0" : "") + tzMin;
    if (tz != tzString) {
        var junk = msg.split('$1');
        document.write(junk[0] + "UTC" + tzString + junk[1]);
    }
}

function unhidetzbutton() {
    var tzb = document.getElementById('guesstimezonebutton');
    if (tzb) {
        tzb.style.display = 'inline';
    }
}

// in [-]HH:MM format...
// won't yet work with non-even tzs
function fetchTimezone() {
    // FIXME: work around Safari bug
    var localclock = new Date();
    // returns negative offset from GMT in minutes
    var tzRaw = localclock.getTimezoneOffset();
    var tzHour = Math.floor( Math.abs(tzRaw) / 60);
    var tzMin = Math.abs(tzRaw) % 60;
    var tzString = ((tzRaw >= 0) ? "-" : "") + ((tzHour < 10) ? "0" : "") + tzHour +
        ":" + ((tzMin < 10) ? "0" : "") + tzMin;
    return tzString;
}

function guessTimezone(box) {
    document.getElementsByName("wpHourDiff")[0].value = fetchTimezone();
}

function showTocToggle() {
    if (document.createTextNode) {
        // Uses DOM calls to avoid document.write + XHTML issues

        var linkHolder = document.getElementById('toctitle');
        if (!linkHolder) {
            return;
        }

        var outerSpan = document.createElement('span');
        outerSpan.className = 'toctoggle';

        var toggleLink = document.createElement('a');
        toggleLink.id = 'togglelink';
        toggleLink.className = 'internal';
        toggleLink.href = 'javascript:toggleToc()';
        toggleLink.appendChild(document.createTextNode(tocHideText));

        outerSpan.appendChild(document.createTextNode('['));
        outerSpan.appendChild(toggleLink);
        outerSpan.appendChild(document.createTextNode(']'));

        linkHolder.appendChild(document.createTextNode(' '));
        linkHolder.appendChild(outerSpan);

        var cookiePos = document.cookie.indexOf("hidetoc=");
        if (cookiePos > -1 && document.cookie.charAt(cookiePos + 8) == 1) {
            toggleToc();
        }
    }
}

function changeText(el, newText) {
    // Safari work around
    if (el.innerText) {
        el.innerText = newText;
    } else if (el.firstChild && el.firstChild.nodeValue) {
        el.firstChild.nodeValue = newText;
    }
}

function toggleToc() {
    var toc = document.getElementById('toc').getElementsByTagName('ul')[0];
    var toggleLink = document.getElementById('togglelink');

    if (toc && toggleLink && toc.style.display == 'none') {
        changeText(toggleLink, tocHideText);
        toc.style.display = 'block';
        document.cookie = "hidetoc=0";
    } else {
        changeText(toggleLink, tocShowText);
        toc.style.display = 'none';
        document.cookie = "hidetoc=1";
    }
}

var mwEditButtons = [];
var mwCustomEditButtons = []; // eg to add in MediaWiki:Common.js

// this function generates the actual toolbar buttons with localized text
// we use it to avoid creating the toolbar where javascript is not enabled
function addButton(imageFile, speedTip, tagOpen, tagClose, sampleText, imageId) {
    // Don't generate buttons for browsers which don't fully
    // support it.
    mwEditButtons[mwEditButtons.length] =
        {"imageId": imageId,
         "imageFile": imageFile,
         "speedTip": speedTip,
         "tagOpen": tagOpen,
         "tagClose": tagClose,
         "sampleText": sampleText};
}

// this function generates the actual toolbar buttons with localized text
// we use it to avoid creating the toolbar where javascript is not enabled
function mwInsertEditButton(parent, item) {
    var image = document.createElement("img");
    image.width = 23;
    image.height = 22;
    image.className = "mw-toolbar-editbutton";
    if (item.imageId) image.id = item.imageId;
    image.src = item.imageFile;
    image.border = 0;
    image.alt = item.speedTip;
    image.title = item.speedTip;
    image.style.cursor = "pointer";
    image.onclick = function() {
        insertTags(item.tagOpen, item.tagClose, item.sampleText);
        return false;
    };

    parent.appendChild(image);
    return true;
}

function mwSetupToolbar() {
    var toolbar = document.getElementById('toolbar');
    if (!toolbar) { return false; }

    var textbox = document.getElementById('wpTextbox1');
    if (!textbox) { return false; }

    // Don't generate buttons for browsers which don't fully
    // support it.
    if (!document.selection && textbox.selectionStart === null) {
        return false;
    }

    for (var i = 0; i < mwEditButtons.length; i++) {
        mwInsertEditButton(toolbar, mwEditButtons[i]);
    }
    for (var i = 0; i < mwCustomEditButtons.length; i++) {
        mwInsertEditButton(toolbar, mwCustomEditButtons[i]);
    }
    return true;
}

function escapeQuotes(text) {
    var re = new RegExp("'","g");
    text = text.replace(re,"\\'");
    re = new RegExp("\\n","g");
    text = text.replace(re,"\\n");
    return escapeQuotesHTML(text);
}

function escapeQuotesHTML(text) {
    var re = new RegExp('&',"g");
    text = text.replace(re,"&amp;");
    re = new RegExp('"',"g");
    text = text.replace(re,"&quot;");
    re = new RegExp('<',"g");
    text = text.replace(re,"&lt;");
    re = new RegExp('>',"g");
    text = text.replace(re,"&gt;");
    return text;
}

// apply tagOpen/tagClose to selection in textarea,
// use sampleText instead of selection if there is none
// copied and adapted from phpBB
function insertTags(tagOpen, tagClose, sampleText) {
    var txtarea;
    if (document.editform) {
        txtarea = document.editform.wpTextbox1;
    } else {
        // some alternate form? take the first one we can find
        var areas = document.getElementsByTagName('textarea');
        txtarea = areas[0];
    }

    // IE
    if (document.selection  && !is_gecko) {
        var theSelection = document.selection.createRange().text;
        if (!theSelection) {
            theSelection=sampleText;
        }
        txtarea.focus();
        if (theSelection.charAt(theSelection.length - 1) == " ") { // exclude ending space char, if any
            theSelection = theSelection.substring(0, theSelection.length - 1);
            document.selection.createRange().text = tagOpen + theSelection + tagClose + " ";
        } else {
            document.selection.createRange().text = tagOpen + theSelection + tagClose;
        }

    // Mozilla
    } else if(txtarea.selectionStart || txtarea.selectionStart == '0') {
        var replaced = false;
        var startPos = txtarea.selectionStart;
        var endPos = txtarea.selectionEnd;
        if (endPos-startPos) {
            replaced = true;
        }
        var scrollTop = txtarea.scrollTop;
        var myText = (txtarea.value).substring(startPos, endPos);
        if (!myText) {
            myText=sampleText;
        }
        var subst;
        if (myText.charAt(myText.length - 1) == " ") { // exclude ending space char, if any
            subst = tagOpen + myText.substring(0, (myText.length - 1)) + tagClose + " ";
        } else {
            subst = tagOpen + myText + tagClose;
        }
        txtarea.value = txtarea.value.substring(0, startPos) + subst +
            txtarea.value.substring(endPos, txtarea.value.length);
        txtarea.focus();
        //set new selection
        if (replaced) {
            var cPos = startPos+(tagOpen.length+myText.length+tagClose.length);
            txtarea.selectionStart = cPos;
            txtarea.selectionEnd = cPos;
        } else {
            txtarea.selectionStart = startPos+tagOpen.length;
            txtarea.selectionEnd = startPos+tagOpen.length+myText.length;
        }
        txtarea.scrollTop = scrollTop;

    // All other browsers get no toolbar.
    // There was previously support for a crippled "help"
    // bar, but that caused more problems than it solved.
    }
    // reposition cursor if possible
    if (txtarea.createTextRange) {
        txtarea.caretPos = document.selection.createRange().duplicate();
    }
}


/**
 * Set the accesskey prefix based on browser detection.
 */
var tooltipAccessKeyPrefix = 'alt-';
if (is_opera) {
    tooltipAccessKeyPrefix = 'shift-esc-';
} else if (is_safari
       || navigator.userAgent.toLowerCase().indexOf('mac') != -1
       || navigator.userAgent.toLowerCase().indexOf('konqueror') != -1 ) {
    tooltipAccessKeyPrefix = 'ctrl-';
} else if (is_ff2_x11 || is_ff2_win) {
    tooltipAccessKeyPrefix = 'alt-shift-';
}
var tooltipAccessKeyRegexp = /\[(ctrl-)?(alt-)?(shift-)?(esc-)?.\]$/;

/**
 * Add the appropriate prefix to the accesskey shown in the tooltip.
 * If the nodeList parameter is given, only those nodes are updated;
 * otherwise, all the nodes that will probably have accesskeys by
 * default are updated.
 *
 * @param Array nodeList -- list of elements to update
 */
function updateTooltipAccessKeys( nodeList ) {
    if ( !nodeList ) {
        // skins without a "column-one" element don't seem to have links with accesskeys either
        var columnOne = document.getElementById("column-one");
        if ( columnOne )
            updateTooltipAccessKeys( columnOne.getElementsByTagName("a") );
        // these are rare enough that no such optimization is needed
        updateTooltipAccessKeys( document.getElementsByTagName("input") );
        updateTooltipAccessKeys( document.getElementsByTagName("label") );
        return;
    }

    for ( var i = 0; i < nodeList.length; i++ ) {
        var element = nodeList[i];
        var tip = element.getAttribute("title");
        var key = element.getAttribute("accesskey");
        if ( key && tooltipAccessKeyRegexp.exec(tip) ) {
            tip = tip.replace(tooltipAccessKeyRegexp,
                      "["+tooltipAccessKeyPrefix+key+"]");
            element.setAttribute("title", tip );
        }
    }
}

/**
 * Add a link to one of the portlet menus on the page, including:
 *
 * p-cactions: Content actions (shown as tabs above the main content in Monobook)
 * p-personal: Personal tools (shown at the top right of the page in Monobook)
 * p-navigation: Navigation
 * p-tb: Toolbox
 *
 * This function exists for the convenience of custom JS authors.  All
 * but the first three parameters are optional, though providing at
 * least an id and a tooltip is recommended.
 *
 * By default the new link will be added to the end of the list.  To
 * add the link before a given existing item, pass the DOM node of
 * that item (easily obtained with document.getElementById()) as the
 * nextnode parameter; to add the link _after_ an existing item, pass
 * the node's nextSibling instead.
 *
 * @param String portlet -- id of the target portlet ("p-cactions", "p-personal", "p-navigation" or "p-tb")
 * @param String href -- link URL
 * @param String text -- link text (will be automatically lowercased by CSS for p-cactions in Monobook)
 * @param String id -- id of the new item, should be unique and preferably have the appropriate prefix ("ca-", "pt-", "n-" or "t-")
 * @param String tooltip -- text to show when hovering over the link, without accesskey suffix
 * @param String accesskey -- accesskey to activate this link (one character, try to avoid conflicts)
 * @param Node nextnode -- the DOM node before which the new item should be added, should be another item in the same list
 *
 * @return Node -- the DOM node of the new item (an LI element) or null
 */
function addPortletLink(portlet, href, text, id, tooltip, accesskey, nextnode) {
    var node = document.getElementById(portlet);
    if ( !node ) return null;
    node = node.getElementsByTagName( "ul" )[0];
    if ( !node ) return null;

    var link = document.createElement( "a" );
    link.appendChild( document.createTextNode( text ) );
    link.href = href;

    var item = document.createElement( "li" );
    item.appendChild( link );
    if ( id ) item.id = id;

    if ( accesskey ) {
        link.setAttribute( "accesskey", accesskey );
        tooltip += " ["+accesskey+"]";
    }
    if ( tooltip ) {
        link.setAttribute( "title", tooltip );
    }
    if ( accesskey && tooltip ) {
        updateTooltipAccessKeys( new Array( link ) );
    }

    if ( nextnode && nextnode.parentNode == node )
        node.insertBefore( item, nextnode );
    else
        node.appendChild( item );  // IE compatibility (?)

    return item;
}


/**
 * Set up accesskeys/tooltips from the deprecated ta array.  If doId
 * is specified, only set up for that id.  Note that this function is
 * deprecated and will not be supported indefinitely -- use
 * updateTooltipAccessKey() instead.
 *
 * @param mixed doId string or null
 */
function akeytt( doId ) {
    // A lot of user scripts (and some of the code below) break if
    // ta isn't defined, so we make sure it is.  Explictly using
    // window.ta avoids a "ta is not defined" error.
    if (!window.ta) window.ta = new Array;

    // Make a local, possibly restricted, copy to avoid clobbering
    // the original.
    var ta;
    if ( doId ) {
        ta = new Array;
        ta[doId] = window.ta[doId];
    } else {
        ta = window.ta;
    }

    // Now deal with evil deprecated ta
    var watchCheckboxExists = document.getElementById( 'wpWatchthis' ) ? true : false;
    for (var id in ta) {
        var n = document.getElementById(id);
        if (n) {
            var a = null;
            var ak = '';
            // Are we putting accesskey in it
            if (ta[id][0].length > 0) {
                // Is this object a object? If not assume it's the next child.

                if (n.nodeName.toLowerCase() == "a") {
                    a = n;
                } else {
                    a = n.childNodes[0];
                }
                 // Don't add an accesskey for the watch tab if the watch
                 // checkbox is also available.
                if (a && ((id != 'ca-watch' && id != 'ca-unwatch') || !watchCheckboxExists)) {
                    a.accessKey = ta[id][0];
                    ak = ' ['+tooltipAccessKeyPrefix+ta[id][0]+']';
                }
            } else {
                // We don't care what type the object is when assigning tooltip
                a = n;
                ak = '';
            }

            if (a) {
                a.title = ta[id][1]+ak;
            }
        }
    }
}

function setupRightClickEdit() {
    if (document.getElementsByTagName) {
        var spans = document.getElementsByTagName('span');
        for (var i = 0; i < spans.length; i++) {
            var el = spans[i];
            if(el.className == 'editsection') {
                addRightClickEditHandler(el);
            }
        }
    }
}

function addRightClickEditHandler(el) {
    for (var i = 0; i < el.childNodes.length; i++) {
        var link = el.childNodes[i];
        if (link.nodeType == 1 && link.nodeName.toLowerCase() == 'a') {
            var editHref = link.getAttribute('href');
            // find the enclosing (parent) header
            var prev = el.parentNode;
            if (prev && prev.nodeType == 1 &&
            prev.nodeName.match(/^[Hh][1-6]$/)) {
                prev.oncontextmenu = function(e) {
                    if (!e) { e = window.event; }
                    // e is now the event in all browsers
                    var targ;
                    if (e.target) { targ = e.target; }
                    else if (e.srcElement) { targ = e.srcElement; }
                    if (targ.nodeType == 3) { // defeat Safari bug
                        targ = targ.parentNode;
                    }
                    // targ is now the target element

                    // We don't want to deprive the noble reader of a context menu
                    // for the section edit link, do we?  (Might want to extend this
                    // to all <a>'s?)
                    if (targ.nodeName.toLowerCase() != 'a'
                    || targ.parentNode.className != 'editsection') {
                        document.location = editHref;
                        return false;
                    }
                    return true;
                };
            }
        }
    }
}

var checkboxes;
var lastCheckbox;

function setupCheckboxShiftClick() {
    checkboxes = [];
    lastCheckbox = null;
    var inputs = document.getElementsByTagName('input');
    addCheckboxClickHandlers(inputs);
}

function addCheckboxClickHandlers(inputs, start) {
    if ( !start) start = 0;

    var finish = start + 250;
    if ( finish > inputs.length )
        finish = inputs.length;

    for ( var i = start; i < finish; i++ ) {
        var cb = inputs[i];
        if ( !cb.type || cb.type.toLowerCase() != 'checkbox' )
            continue;
        cb.index = checkboxes.push(cb) - 1;
        cb.onmouseup = checkboxMouseupHandler;
    }

    if ( finish < inputs.length ) {
        setTimeout( function () {
            addCheckboxClickHandlers(inputs, finish);
        }, 200 );
    }
}

function checkboxMouseupHandler(e) {
    if (typeof e == 'undefined') {
        e = window.event;
    }
    if ( !e.shiftKey || lastCheckbox === null ) {
        lastCheckbox = this.index;
        return true;
    }
    var endState = !this.checked;
    if ( is_opera ) { // opera has already toggled the checkbox by this point
        endState = !endState;
    }
    var start, finish;
    if ( this.index < lastCheckbox ) {
        start = this.index + 1;
        finish = lastCheckbox;
    } else {
        start = lastCheckbox;
        finish = this.index - 1;
    }
    for (var i = start; i <= finish; ++i ) {
        checkboxes[i].checked = endState;
    }
    lastCheckbox = this.index;
    return true;
}

function toggle_element_activation(ida,idb) {
    if (!document.getElementById) {
        return;
    }
    document.getElementById(ida).disabled=true;
    document.getElementById(idb).disabled=false;
}

function toggle_element_check(ida,idb) {
    if (!document.getElementById) {
        return;
    }
    document.getElementById(ida).checked=true;
    document.getElementById(idb).checked=false;
}

function fillDestFilename(id) {
    if (!document.getElementById) {
        return;
    }
    var path = document.getElementById(id).value;
    // Find trailing part
    var slash = path.lastIndexOf('/');
    var backslash = path.lastIndexOf('\\');
    var fname;
    if (slash == -1 && backslash == -1) {
        fname = path;
    } else if (slash > backslash) {
        fname = path.substring(slash+1, 10000);
    } else {
        fname = path.substring(backslash+1, 10000);
    }

    // Capitalise first letter and replace spaces by underscores
    fname = fname.charAt(0).toUpperCase().concat(fname.substring(1,10000)).replace(/ /g, '_');

    // Output result
    var destFile = document.getElementById('wpDestFile');
    if (destFile) {
        destFile.value = fname;
    }
}

function scrollEditBox() {
    var editBoxEl = document.getElementById("wpTextbox1");
    var scrollTopEl = document.getElementById("wpScrolltop");
    var editFormEl = document.getElementById("editform");

    if (editBoxEl && scrollTopEl) {
        if (scrollTopEl.value) { editBoxEl.scrollTop = scrollTopEl.value; }
        editFormEl.onsubmit = function() {
            document.getElementById("wpScrolltop").value = document.getElementById("wpTextbox1").scrollTop;
        };
    }
}

hookEvent("load", scrollEditBox);

var allmessages_nodelist = false;
var allmessages_modified = false;
var allmessages_timeout = false;
var allmessages_running = false;

function allmessagesmodified() {
    allmessages_modified = !allmessages_modified;
    allmessagesfilter();
}

function allmessagesfilter() {
    if ( allmessages_timeout )
        window.clearTimeout( allmessages_timeout );

    if ( !allmessages_running )
        allmessages_timeout = window.setTimeout( 'allmessagesfilter_do();', 500 );
}

function allmessagesfilter_do() {
    if ( !allmessages_nodelist )
        return;

    var text = document.getElementById('allmessagesinput').value;
    var nodef = allmessages_modified;

    allmessages_running = true;

    for ( var name in allmessages_nodelist ) {
        var nodes = allmessages_nodelist[name];
        var display = ( name.indexOf( text ) == -1 ? 'none' : '' );

        for ( var i = 0; i < nodes.length; i++)
            nodes[i].style.display =
                ( nodes[i].className == "def" && nodef
                  ? 'none' : display );
    }

    if ( text != document.getElementById('allmessagesinput').value ||
         nodef != allmessages_modified )
        allmessagesfilter_do();  // repeat

    allmessages_running = false;
}

function allmessagesfilter_init() {
    if ( allmessages_nodelist )
        return;

    var nodelist = new Array();
    var templist = new Array();

    var table = document.getElementById('allmessagestable');
    if ( !table ) return;

    var rows = document.getElementsByTagName('tr');
    for ( var i = 0; i < rows.length; i++ ) {
        var id = rows[i].getAttribute('id')
        if ( id && id.substring(0,16) != 'sp-allmessages-r' ) continue;
        templist[ id ] = rows[i];
    }

    var spans = table.getElementsByTagName('span');
    for ( var i = 0; i < spans.length; i++ ) {
        var id = spans[i].getAttribute('id')
        if ( id && id.substring(0,17) != 'sp-allmessages-i-' ) continue;
        if ( !spans[i].firstChild || spans[i].firstChild.nodeType != 3 ) continue;

        var nodes = new Array();
        var row1 = templist[ id.replace('i', 'r1') ];
        var row2 = templist[ id.replace('i', 'r2') ];

        if ( row1 ) nodes[nodes.length] = row1;
        if ( row2 ) nodes[nodes.length] = row2;
        nodelist[ spans[i].firstChild.nodeValue ] = nodes;
    }

    var k = document.getElementById('allmessagesfilter');
    if (k) { k.style.display = ''; }

    allmessages_nodelist = nodelist;
}

hookEvent( "load", allmessagesfilter_init );

/*
    Written by Jonathan Snook, http://www.snook.ca/jonathan
    Add-ons by Robert Nyman, http://www.robertnyman.com
    Author says "The credit comment is all it takes, no license. Go crazy with it!:-)"
    From http://www.robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/
*/
function getElementsByClassName(oElm, strTagName, oClassNames){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    var arrRegExpClassNames = new Array();
    if(typeof oClassNames == "object"){
        for(var i=0; i<oClassNames.length; i++){
            arrRegExpClassNames.push(new RegExp("(^|\\s)" + oClassNames[i].replace(/\-/g, "\\-") + "(\\s|$)"));
        }
    }
    else{
        arrRegExpClassNames.push(new RegExp("(^|\\s)" + oClassNames.replace(/\-/g, "\\-") + "(\\s|$)"));
    }
    var oElement;
    var bMatchesAll;
    for(var j=0; j<arrElements.length; j++){
        oElement = arrElements[j];
        bMatchesAll = true;
        for(var k=0; k<arrRegExpClassNames.length; k++){
            if(!arrRegExpClassNames[k].test(oElement.className)){
                bMatchesAll = false;
                break;
            }
        }
        if(bMatchesAll){
            arrReturnElements.push(oElement);
        }
    }
    return (arrReturnElements)
}

function redirectToFragment(fragment) {
    var match = navigator.userAgent.match(/AppleWebKit\/(\d+)/);
    if (match) {
        var webKitVersion = parseInt(match[1]);
        if (webKitVersion < 420) {
            // Released Safari w/ WebKit 418.9.1 messes up horribly
            // Nightlies of 420+ are ok
            return;
        }
    }
    if (is_gecko) {
        // Mozilla needs to wait until after load, otherwise the window doesn't scroll
        addOnloadHook(function () {
            if (window.location.hash == "")
                window.location.hash = fragment;
        });
    } else {
        if (window.location.hash == "")
            window.location.hash = fragment;
    }
}

/*
 * Table sorting script  by Joost de Valk, check it out at http://www.joostdevalk.nl/code/sortable-table/.
 * Based on a script from http://www.kryogenix.org/code/browser/sorttable/.
 * Distributed under the MIT license: http://www.kryogenix.org/code/browser/licence.html .
 *
 * Copyright (c) 1997-2006 Stuart Langridge, Joost de Valk.
 *
 * @todo don't break on colspans/rowspans (bug 8028)
 * @todo language-specific digit grouping/decimals (bug 8063)
 * @todo support all accepted date formats (bug 8226)
 */

var ts_image_path = stylepath+"/common/images/";
var ts_image_up = "sort_up.gif";
var ts_image_down = "sort_down.gif";
var ts_image_none = "sort_none.gif";
//var ts_europeandate = wgContentLanguage != "en"; // The non-American-inclined can change to "true"
var ts_europeandate = true;
var ts_alternate_row_colors = true;
var SORT_COLUMN_INDEX;

function sortables_init() {
    var idnum = 0;
    // Find all tables with class sortable and make them sortable
    var tables = getElementsByClassName(document, "table", "sortable");
    for (var ti = 0; ti < tables.length ; ti++) {
        if (!tables[ti].id) {
            tables[ti].setAttribute('id','sortable_table_id_'+idnum);
            ++idnum;
        }
        ts_makeSortable(tables[ti]);
    }
}

function ts_makeSortable(table) {
    var firstRow;
    if (table.rows && table.rows.length > 0) {
        if (table.tHead && table.tHead.rows.length > 0) {
            firstRow = table.tHead.rows[table.tHead.rows.length-1];
        } else {
            firstRow = table.rows[0];
        }
    }
    if (!firstRow) return;

    // We have a first row: assume it's the header, and make its contents clickable links
    for (var i = 0; i < firstRow.cells.length; i++) {
        var cell = firstRow.cells[i];
        if ((" "+cell.className+" ").indexOf(" unsortable ") == -1) {
            cell.innerHTML += '&nbsp;&nbsp;<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;"><span class="sortarrow"><img src="'+ ts_image_path + ts_image_none + '" alt="&darr;"/></span></a>';
        }
    }
    if (ts_alternate_row_colors) {
        ts_alternate(table);
    }
}

function ts_getInnerText(el) {
    if (typeof el == "string") return el;
    if (typeof el == "undefined") { return el };
    if (el.innerText) return el.innerText;    // Not needed but it is faster
    var str = "";

    var cs = el.childNodes;
    var l = cs.length;
    for (var i = 0; i < l; i++) {
        switch (cs[i].nodeType) {
            case 1: //ELEMENT_NODE
                str += ts_getInnerText(cs[i]);
                break;
            case 3:    //TEXT_NODE
                str += cs[i].nodeValue;
                break;
        }
    }
    return str;
}

function ts_resortTable(lnk) {
    // get the span
    var span = lnk.getElementsByTagName('span')[0];

    var td = lnk.parentNode;
    var tr = td.parentNode;
    var column = td.cellIndex;

    var table = tr.parentNode;
    while (table && !(table.tagName && table.tagName.toLowerCase() == 'table'))
        table = table.parentNode;
    if (!table) return;

    // Work out a type for the column
    if (table.rows.length <= 1) return;

    // Skip the first row if that's where the headings are
    var rowStart = (table.tHead && table.tHead.rows.length > 0 ? 0 : 1);

    var itm = "";
    for (var i = rowStart; i < table.rows.length; i++) {
        if (table.rows[i].cells.length > column) {
            itm = ts_getInnerText(table.rows[i].cells[column]);
            itm = itm.replace(/^[\s\xa0]+/, "").replace(/[\s\xa0]+$/, "");
            if (itm != "") break;
        }
    }

    sortfn = ts_sort_caseinsensitive;
    if (itm.match(/^\d\d[\/. -][a-zA-Z]{3}[\/. -]\d\d\d\d$/))
        sortfn = ts_sort_date;
    if (itm.match(/^\d\d[\/.-]\d\d[\/.-]\d\d\d\d$/))
        sortfn = ts_sort_date;
    if (itm.match(/^\d\d[\/.-]\d\d[\/.-]\d\d$/))
        sortfn = ts_sort_date;
    if (itm.match(/^[\u00a3$\u20ac]/)) // pound dollar euro
        sortfn = ts_sort_currency;
    if (itm.match(/^[\d.,]+\%?$/))
        sortfn = ts_sort_numeric;

    var reverse = (span.getAttribute("sortdir") == 'down');

    var newRows = new Array();
    for (var j = rowStart; j < table.rows.length; j++) {
        var row = table.rows[j];
        var keyText = ts_getInnerText(row.cells[column]);
        var oldIndex = (reverse ? -j : j);

        newRows[newRows.length] = new Array(row, keyText, oldIndex);
    }

    newRows.sort(sortfn);

    var arrowHTML;
    if (reverse) {
            arrowHTML = '<img src="'+ ts_image_path + ts_image_down + '" alt="&darr;"/>';
            newRows.reverse();
            span.setAttribute('sortdir','up');
    } else {
            arrowHTML = '<img src="'+ ts_image_path + ts_image_up + '" alt="&uarr;"/>';
            span.setAttribute('sortdir','down');
    }

    // We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
    // don't do sortbottom rows
    for (var i = 0; i < newRows.length; i++) {
        if ((" "+newRows[i][0].className+" ").indexOf(" sortbottom ") == -1)
            table.tBodies[0].appendChild(newRows[i][0]);
    }
    // do sortbottom rows only
    for (var i = 0; i < newRows.length; i++) {
        if ((" "+newRows[i][0].className+" ").indexOf(" sortbottom ") != -1)
            table.tBodies[0].appendChild(newRows[i][0]);
    }

    // Delete any other arrows there may be showing
    var spans = getElementsByClassName(tr, "span", "sortarrow");
    for (var i = 0; i < spans.length; i++) {
        spans[i].innerHTML = '<img src="'+ ts_image_path + ts_image_none + '" alt="&darr;"/>';
    }
    span.innerHTML = arrowHTML;

    ts_alternate(table);
}

function ts_dateToSortKey(date) {
    // y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
    if (date.length == 11) {
        switch (date.substr(3,3).toLowerCase()) {
            case "jan": var month = "01"; break;
            case "feb": var month = "02"; break;
            case "mar": var month = "03"; break;
            case "apr": var month = "04"; break;
            case "may": var month = "05"; break;
            case "jun": var month = "06"; break;
            case "jul": var month = "07"; break;
            case "aug": var month = "08"; break;
            case "sep": var month = "09"; break;
            case "oct": var month = "10"; break;
            case "nov": var month = "11"; break;
            case "dec": var month = "12"; break;
            // default: var month = "00";
        }
        return date.substr(7,4)+month+date.substr(0,2);
    } else if (date.length == 10) {
        if (ts_europeandate == false) {
            return date.substr(6,4)+date.substr(0,2)+date.substr(3,2);
        } else {
            return date.substr(6,4)+date.substr(3,2)+date.substr(0,2);
        }
    } else if (date.length == 8) {
        yr = date.substr(6,2);
        if (parseInt(yr) < 50) {
            yr = '20'+yr;
        } else {
            yr = '19'+yr;
        }
        if (ts_europeandate == true) {
            return yr+date.substr(3,2)+date.substr(0,2);
        } else {
            return yr+date.substr(0,2)+date.substr(3,2);
        }
    }
    return "00000000";
}

function ts_parseFloat(num) {
    if (!num) return 0;
    num = parseFloat(num.replace(/,/, ""));
    return (isNaN(num) ? 0 : num);
}

function ts_sort_date(a,b) {
    var aa = ts_dateToSortKey(a[1]);
    var bb = ts_dateToSortKey(b[1]);
    return (aa < bb ? -1 : aa > bb ? 1 : a[2] - b[2]);
}

function ts_sort_currency(a,b) {
    var aa = ts_parseFloat(a[1].replace(/[^0-9.]/g,''));
    var bb = ts_parseFloat(b[1].replace(/[^0-9.]/g,''));
    return (aa != bb ? aa - bb : a[2] - b[2]);
}

function ts_sort_numeric(a,b) {
    var aa = ts_parseFloat(a[1]);
    var bb = ts_parseFloat(b[1]);
    return (aa != bb ? aa - bb : a[2] - b[2]);
}

function ts_sort_caseinsensitive(a,b) {
    var aa = a[1].toLowerCase();
    var bb = b[1].toLowerCase();
    return (aa < bb ? -1 : aa > bb ? 1 : a[2] - b[2]);
}

function ts_sort_default(a,b) {
    return (a[1] < b[1] ? -1 : a[1] > b[1] ? 1 : a[2] - b[2]);
}

function ts_alternate(table) {
    // Take object table and get all it's tbodies.
    var tableBodies = table.getElementsByTagName("tbody");
    // Loop through these tbodies
    for (var i = 0; i < tableBodies.length; i++) {
        // Take the tbody, and get all it's rows
        var tableRows = tableBodies[i].getElementsByTagName("tr");
        // Loop through these rows
        // Start at 1 because we want to leave the heading row untouched
        for (var j = 0; j < tableRows.length; j++) {
            // Check if j is even, and apply classes for both possible results
            var oldClasses = tableRows[j].className.split(" ");
            var newClassName = "";
            for (var k = 0; k < oldClasses.length; k++) {
                if (oldClasses[k] != "" && oldClasses[k] != "even" && oldClasses[k] != "odd")
                    newClassName += oldClasses[k] + " ";
            }
            tableRows[j].className = newClassName + (j % 2 == 0 ? "even" : "odd");
        }
    }
}

/*
 * End of table sorting code
 */

function runOnloadHook() {
    // don't run anything below this for non-dom browsers
    if (doneOnloadHook || !(document.getElementById && document.getElementsByTagName)) {
        return;
    }

    // set this before running any hooks, since any errors below
    // might cause the function to terminate prematurely
    doneOnloadHook = true;

    histrowinit();
    unhidetzbutton();
    tabbedprefs();
    updateTooltipAccessKeys( null );
    akeytt( null );
    scrollEditBox();
    setupCheckboxShiftClick();
    sortables_init();

    // Run any added-on functions
    for (var i = 0; i < onloadFuncts.length; i++) {
        onloadFuncts[i]();
    }
}

//note: all skins should call runOnloadHook() at the end of html output,
//      so the below should be redundant. It's there just in case.
hookEvent("load", runOnloadHook);

hookEvent("load", mwSetupToolbar);