function goToUrl(event){
    if (event.tagName) {
        if (!event.getElementsByTagName('a')[0].selected) {
            location.href = event.getElementsByTagName('a')[0].href;
        }
    }
    else {
        if (event['srcElement'].tagName == 'LI') {
            if (!event['srcElement'].getElementsByTagName('a')[0].selected) {
                location.href = event['srcElement'].getElementsByTagName('a')[0].href;
            }
        }
        else 
            if (event['srcElement'].tagName == 'A') {
                if (!event['srcElement'].selected) {
                    location.href = event['srcElement'].href;
                }
            }
    }
}

function tamingselect(){
    if (!document.getElementById && !document.createTextNode) {
        return;
    }
    
    // Classes for the link and the visible dropdown
    var ts_selectclass = 'turnintodropdown'; // class to identify selects
    var ts_listclass = 'turnintoselect'; // class to identify ULs
    var ts_boxclass = 'dropcontainer'; // parent element
    var ts_triggeron = 'activetrigger'; // class for the active trigger link
    var ts_triggeroff = 'trigger'; // class for the inactive trigger link
    var ts_dropdownclosed = 'dropdownhidden'; // closed dropdown
    var ts_dropdownopen = 'dropdownvisible'; // open dropdown
    /*
     Turn all selects into DOM dropdowns
     */
    var count = 0;
    var toreplace = new Array();
    var sels = document.getElementsByTagName('select');
    for (var i = 0; i < sels.length; i++) {
        if (ts_check(sels[i], ts_selectclass)) {
            var hiddenfield = document.createElement('input');
            hiddenfield.name = sels[i].name;
            hiddenfield.type = 'hidden';
            hiddenfield.id = sels[i].id;
            hiddenfield.value = sels[i].options[0].value;
            sels[i].parentNode.insertBefore(hiddenfield, sels[i])
            var trigger = document.createElement('a');
            ts_addclass(trigger, ts_triggeroff);
            trigger.href = '#';
            trigger.onclick = function(){
                ts_swapclass(this, ts_triggeroff, ts_triggeron)
                ts_swapclass(this.parentNode.getElementsByTagName('ul')[0], ts_dropdownclosed, ts_dropdownopen);
                return false;
            }
            trigger.appendChild(document.createTextNode(sels[i].options[0].text));
            sels[i].parentNode.insertBefore(trigger, sels[i]);
            var replaceUL = document.createElement('ul');
            for (var j = 0; j < sels[i].getElementsByTagName('option').length; j++) {
                var newli = document.createElement('li');
                var newa = document.createElement('a');
                newli.v = sels[i].getElementsByTagName('option')[j].value;
                newli.elm = hiddenfield;
                newli.istrigger = trigger;
                newa.href = newli.v;
                newa.appendChild(document.createTextNode(sels[i].getElementsByTagName('option')[j].text));
                newli.onclick = function(){
                    this.elm.value = this.v;
                    ts_swapclass(this.istrigger, ts_triggeron, ts_triggeroff);
                    ts_swapclass(this.parentNode, ts_dropdownopen, ts_dropdownclosed)
                    this.istrigger.firstChild.nodeValue = this.firstChild.firstChild.nodeValue;
                    return false;
                }
                if ((sels[i].onchange + '').match("goToUrl") != null) {
                    if (sels[i].getElementsByTagName('option')[j].getAttribute('selected') == 'selected') {
                        newa.setAttribute('selected', 'selected');
                    }
                    else 
                        if (sels[i].getElementsByTagName('option')[j].getAttribute('selected')) {
                            newa.setAttribute('selected', 'selected');
                        }
                    if (newli.addEventListener) 
                        newli.addEventListener("click", function(){
                            goToUrl(this);
                        }, false);
                    if (newli.attachEvent) 
                        newli.attachEvent("onclick", function(){
                            goToUrl(event);
                        }, false);
                }
                newli.appendChild(newa);
                replaceUL.appendChild(newli);
            }
            ts_addclass(replaceUL, ts_dropdownclosed);
            var div = document.createElement('div');
            div.appendChild(replaceUL);
            ts_addclass(div, ts_boxclass);
            sels[i].parentNode.insertBefore(div, sels[i])
            toreplace[count] = sels[i];
            count++;
        }
    }
    
    /*
     Turn all ULs with the class defined above into dropdown navigations
     */
    var uls = document.getElementsByTagName('ul');
    for (var i = 0; i < uls.length; i++) {
        if (ts_check(uls[i], ts_listclass)) {
            var newform = document.createElement('form');
            var newselect = document.createElement('select');
            for (j = 0; j < uls[i].getElementsByTagName('a').length; j++) {
                var newopt = document.createElement('option');
                newopt.value = uls[i].getElementsByTagName('a')[j].href;
                newopt.appendChild(document.createTextNode(uls[i].getElementsByTagName('a')[j].innerHTML));
                newselect.appendChild(newopt);
            }
            newselect.onchange = function(){
                window.location = this.options[this.selectedIndex].value;
            }
            newform.appendChild(newselect);
            uls[i].parentNode.insertBefore(newform, uls[i]);
            toreplace[count] = uls[i];
            count++;
        }
    }
    for (i = 0; i < count; i++) {
        toreplace[i].parentNode.removeChild(toreplace[i]);
    }
    function ts_check(o, c){
        return new RegExp('\\b' + c + '\\b').test(o.className);
    }
    function ts_swapclass(o, c1, c2){
        var cn = o.className
        o.className = !ts_check(o, c1) ? cn.replace(c2, c1) : cn.replace(c1, c2);
    }
    function ts_addclass(o, c){
        if (!ts_check(o, c)) {
            o.className += o.className == '' ? c : ' ' + c;
        }
    }
}

window.onload = function(){
    tamingselect();
    // add more functions if necessary
}