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].onclick=function(){
			showsubmenu(this.parentNode.getAttribute("rev"), this.parentNode.getAttribute("rel"))
			}
		}
	}
}

function getTPosition(obj){
    var topValue= 0,leftValue= 0;
    while(obj){
	topValue+= obj.offsetTop;
	obj= obj.offsetParent;
    }
    return topValue;
}

function getLPosition(obj){
    var topValue= 0,leftValue= 0;
    while(obj){
	leftValue+= obj.offsetLeft;
	obj= obj.offsetParent;
    }
    return leftValue ;
}

function hideObject(someID) 
{ 
document.getElementById(someID).style.display = 'none'; 
} 

function showObject(someID, rsomeID) 
{
hideObject('dropmenu1');
hideObject('dropmenu2');
document.getElementById(someID).style.top = getTPosition(rsomeID)+18;
document.getElementById(someID).style.left = getLPosition(rsomeID);
document.getElementById(someID).style.display = 'inline';
}