var mastertabvar=new Object();
mastertabvar.baseopacity=0;
mastertabvar.browserdetect="";

function showsubmenu(masterid, id){
	if (typeof highlighting!="undefined")
	clearInterval(highlighting)
	submenuobject=document.getElementById(id)
	
	// get all #maintab list items
	var menuitems=document.getElementById(masterid).getElementsByTagName("li");
	// loop through each list item
	for (var i=0; i<menuitems.length; i++){
		// see if list items child link has a class of selected
		if (menuitems[i].getElementsByTagName("a")[0].className == 'selected') {
			// it does so, remove it
			menuitems[i].getElementsByTagName("a")[0].className = '';
		} else {
			// it doesn't so add it
			menuitems[i].getElementsByTagName("a")[0].className = 'selected';
		}
	}
	
	mastertabvar.browserdetect=submenuobject.filters? "ie" : typeof submenuobject.style.MozOpacity=="string"? "mozilla" : ""
	hidesubmenus(mastertabvar[masterid])
	submenuobject.style.display="block"
	instantset(mastertabvar.baseopacity)
	highlighting=setInterval("gradualfade(submenuobject)",50)
}

function hidesubmenus(submenuarray){
for (var i=0; i<submenuarray.length; i++)
document.getElementById(submenuarray[i]).style.display="none"
}

function instantset(degree){
if (mastertabvar.browserdetect=="mozilla")
submenuobject.style.MozOpacity=degree/100
else if (mastertabvar.browserdetect=="ie")
submenuobject.filters.alpha.opacity=degree
}


function gradualfade(cur2){
if (mastertabvar.browserdetect=="mozilla" && cur2.style.MozOpacity<1)
cur2.style.MozOpacity=Math.min(parseFloat(cur2.style.MozOpacity)+0.1, 0.99)
else if (mastertabvar.browserdetect=="ie" && cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=10
else if (typeof highlighting!="undefined") //fading animation over
clearInterval(highlighting)
}

function initalizetab(tabid){
	mastertabvar[tabid]=new Array()
	var menuitems=document.getElementById(tabid).getElementsByTagName("li")
	for (var i=0; i<menuitems.length; i++){
		if (menuitems[i].getAttribute("rel")){
			menuitems[i].setAttribute("rev", tabid) //associate this submenu with main tab
			mastertabvar[tabid][mastertabvar[tabid].length]=menuitems[i].getAttribute("rel") //store ids of submenus of tab menu
			if (menuitems[i].className=="selected") //if (menuitems[i].getElementsByTagName("a").className=="selected")
				showsubmenu(tabid, menuitems[i].getAttribute("rel"))
				//menuitems[i].getElementsByTagName("a")[0].onmouseover=function(){
				
			menuitems[i].getElementsByTagName("a")[0].onclick=function() {
				//showsubmenu(this.parentNode.getAttribute("rev"), this.parentNode.getAttribute("rel"))
				//showsubmenu(this.parentNode.getAttribute("rev"), this.parentNode.getAttribute("rel"), this.className="selected")
				showsubmenu(this.parentNode.getAttribute("rev"), this.parentNode.getAttribute("rel"))
			}
		}
	}
}