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

	function showsubmenu(masterid, id){
		if (typeof highlighting!="undefined") {
			clearInterval(highlighting);
		}
		submenuobject=document.getElementById(id);
		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")
				showsubmenu(tabid, menuitems[i].getAttribute("rel"))
				menuitems[i].getElementsByTagName("a")[0].onmouseover=function(){
				showsubmenu(this.parentNode.getAttribute("rev"), this.parentNode.getAttribute("rel"))
			}
		}
	}
}