/**
 *  Javascript to handle the navigation bar/menu.
 *  
 *  Shay Jamison
 *  11/22/2010
 */


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