MediaWiki:Common.js

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// ============================================================
 // BEGIN Enable multiple onload functions
 
 // setup onload functions this way:
 // aOnloadFunctions[aOnloadFunctions.length] = function_name; // without brackets!
 
 if (!window.aOnloadFunctions) {
   var aOnloadFunctions = new Array();
 }
 
 window.onload = function() {
   if (window.aOnloadFunctions) {
     for (var _i=0; _i<aOnloadFunctions.length; _i++) {
       aOnloadFunctions[_i]();
     }
   }
 }
 
 // END Enable multiple onload functions
 // ============================================================

 //================================================================================
 //*** Dynamic Navigation Bars
 
 // set up the words in your language
 var NavigationBarHide = '[' + collapseCaption + ']';
 var NavigationBarShow = '[' + expandCaption + ']';

 
 // set up max count of Navigation Bars on page,
 // if there are more, all will be hidden
 // NavigationBarShowDefault = 0; // all bars will be hidden
 // NavigationBarShowDefault = 1; // on pages with more than 1 bar all bars will be hidden
 if (typeof NavigationBarShowDefault == 'undefined' ) {
     var NavigationBarShowDefault = 1;
 }
 
 // shows and hides content and picture (if available) of navigation bars
 // Parameters:
 //     indexNavigationBar: the index of navigation bar to be toggled
 function toggleNavigationBar(indexNavigationBar)
 {
    var NavToggle = document.getElementById("NavToggle" + indexNavigationBar);
    var NavFrame = document.getElementById("NavFrame" + indexNavigationBar);
 
    if (!NavFrame || !NavToggle) {
        return false;
    }
 
    // if shown now
    if (NavToggle.firstChild.data == NavigationBarHide) {
        for (
                var NavChild = NavFrame.firstChild;
                NavChild != null;
                NavChild = NavChild.nextSibling
            ) {
            if (NavChild.className == 'NavPic') {
                NavChild.style.display = 'none';
            }
            if (NavChild.className == 'NavContent') {
                NavChild.style.display = 'none';
            }
            if (NavChild.className == 'NavToggle') {
                NavChild.firstChild.data = NavigationBarShow;
            }
        }
 
    // if hidden now
    } else if (NavToggle.firstChild.data == NavigationBarShow) {
        for (
                var NavChild = NavFrame.firstChild;
                NavChild != null;
                NavChild = NavChild.nextSibling
            ) {
            if (NavChild.className == 'NavPic') {
                NavChild.style.display = 'block';
            }
            if (NavChild.className == 'NavContent') {
                NavChild.style.display = 'block';
            }
            if (NavChild.className == 'NavToggle') {
                NavChild.firstChild.data = NavigationBarHide;
            }
        }
    }
 }
 
 // adds show/hide-button to navigation bars
 function createNavigationBarToggleButton()
 {
    var indexNavigationBar = 0;
    // iterate over all < div >-elements
    var divs = document.getElementsByTagName("div");
    for (var i=0;  i<divs.length; i++) {
        var NavFrame = divs[i];
        // if found a navigation bar
        if (NavFrame.className == "NavFrame") {
 
            indexNavigationBar++;
            var NavToggle = document.createElement("a");
            NavToggle.className = 'NavToggle';
            NavToggle.setAttribute('id', 'NavToggle' + indexNavigationBar);
            NavToggle.setAttribute('href', 'javascript:toggleNavigationBar(' + indexNavigationBar + ');');
 
            var NavToggleText = document.createTextNode(NavigationBarHide);
            NavToggle.appendChild(NavToggleText);
 
            // add NavToggle-Button as first div-element 
            // in < div class="NavFrame" >
            NavFrame.insertBefore(
                NavToggle,
                NavFrame.firstChild
            );
            NavFrame.setAttribute('id', 'NavFrame' + indexNavigationBar);
        }
    }
    // if more Navigation Bars found than Default: hide all
    if (NavigationBarShowDefault < indexNavigationBar) {
        for(
                var i=1; 
                i<=indexNavigationBar; 
                i++
        ) {
            toggleNavigationBar(i);
        }
    }
 
 }
 
 addOnloadHook(createNavigationBarToggleButton);