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/**
 Toggles the display of elements on a page
 Author/contact: Austin Che http://openwetware.org/wiki/User:Austin_J._Che
 See http://openwetware.org/wiki/OpenWetWare:Toggle for examples and documentation
 */
 
// indexed array of toggler ids to array of associated toggle operations
// each operation is a two element array, the first being the type, the second a class name or array of elements
// operation types are strings like "_reset" or "" for the default toggle operation
var togglers = new Array();
var allClasses = new Object(); // associative map of class names to page elements
 
function toggler(id) {
    var toBeToggled = togglers[id];
    if (!toBeToggled) return;
 
    // if some element is in list more than once, it will be toggled multiple times
    for (var i = 0; i < toBeToggled.length; i++) {
        // get array of elements to operate on
        var toggles = toBeToggled[i][1];
        if (typeof(toggles) == "string") {
            if (toggles.charAt(0) == '-') {
                // treat as an element ID, not as class
                toggles = document.getElementById(toggles.substring(1));
                if (toggles) toggles = new Array(toggles);
            }
            else toggles = allClasses[toggles];
        }
        if (!toggles || !toggles.length) continue;
 
        var op = toBeToggled[i][0]; // what the operation will be
        switch (op) {
        case "_reset": for (var j in toggles)
            toggles[j].style.display = toggles[j]._toggle_original_display;
            break;
        case "_show":
            for (var j in toggles)
            toggles[j].style.display = ;
            break;
        case "_hide":
            for (var j in toggles)
            toggles[j].style.display = 'none';
            break;
        default:
            // Toggle
            for (var j in toggles)
            toggles[j].style.display = ((toggles[j].style.display == 'none') ?  : 'none');
            break;
        }
    }
}
 
function createTogglerLink(toggler, id) {
    var toggle = document.createElement("a");
    toggle.className = 'toggler-link';
    toggle.setAttribute('id', 'toggler' + id);
    toggle.setAttribute('href', 'javascript:toggler("' + id + '");');
    var child = toggler.firstChild;
    toggler.removeChild(child);
    toggle.appendChild(child);
    toggler.insertBefore(toggle, toggler.firstChild);
}
 
function toggleInit() {
    var togglerElems = new Array();
    var toggleGroup = new Array();
 
    // initialize/clear any old information
    togglers = new Array();
    allClasses = new Object();
    allClasses.watch = undefined;
    allClasses.unwatch = undefined;
 
 
    // make list of all document classes
    var elems = document.getElementsByTagName("*");
    var numelems = elems.length;
    for (var i = 0; i < elems.length; i++) {
        var elem = elems[i];
        if (!elem.className) continue;
 
        elem._toggle_original_display = elem.style.display;
        var togglerID = -1;
        var elemClasses = elem.className.split(' '); // get list of classes
        for (var j = 0; j < elemClasses.length; j++) {
            var elemClass = elemClasses[j];
            if (!allClasses[elemClass]) allClasses[elemClass] = new Array();
            allClasses[elemClass].push(elem);
// all the special classes begin with _toggle
            if (elemClass.substring(0, 7) != "_toggle") continue;
 
            if (elemClass == "_togglegroup") toggleGroup = new Array();
            else if (elemClass == "_toggle") toggleGroup.push(elem);
            else if (elemClass.substring(0, 12) == "_toggle_init") {
                // set initial value for display (ignore the original CSS set value)
                // understands _toggle_initshow and _toggle_inithide
                var disp = elemClass.substring(12);
                if (disp == "show") elem.style.display = ;
                else if (disp == "hide") elem.style.display = 'none';
                elem._toggle_original_display = disp;
            }
            else if (elemClass.substring(0, 8) == "_toggler") {
                if (togglerID == -1) {
                    togglerID = togglers.length;
                    togglers[togglerID] = new Array();
                    togglerElems[togglerID] = elem;
                }
 
                // all classes are of form _toggler_op-CLASS
                // figure out what class we're toggling
                // if none is specified, then we use the current toggle group
                var toBeToggled;
                var hyphen = elemClass.indexOf('-');
                if (hyphen != -1) toBeToggled = elemClass.substring(hyphen + 1);
                else {
                    toBeToggled = toggleGroup;
                    hyphen = elemClass.length;}
 
                var op = elemClass.substring(8, hyphen);
                togglers[togglerID].push(new Array(op, toBeToggled));
            }
        }
    }
 
    // add javascript links to all toggler elements
    for (var i = 0; i < togglerElems.length; i++)
    createTogglerLink(togglerElems[i], i);
}
 
function owwsitesearch(f) {
    f.q.value = 'site:http://openwetware.org/wiki/' + f.base.value + '++' + f.qfront.value;
}
 
addOnloadHook(toggleInit);
 
// </syntax>