//DD Tab Menu- Script rewritten April 27th, 07: http://www.dynamicdrive.com
//**Updated Feb 23rd, 08): Adds ability for menu to revert back to default selected tab when mouse moves out of menu
//Only 2 configuration variables below:
var ddtabmenu={
	disabletablinks: false, //Disable hyperlinks in 1st level tabs with sub contents (true or false)?
	snap2original: [true, 1000], //Should tab revert back to default selected when mouse moves out of menu? ([true/false, delay_millisec]
	currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/)
definemenu:function(tabid, dselected){
	this[tabid+"-menuitems"]=null;
	this[tabid+"-dselected"]=-1;
	this.addEvent(window, function(){ddtabmenu.init(tabid, dselected);}, "load");
},
showsubmenu:function(tabid,targetitem){
	var menuitems=this[tabid+"-menuitems"];
	this.clearrevert2default(tabid);
	for(var i=0;i<menuitems.length;i++){
		menuitems[i].className="";
		if(typeof menuitems[i].hasSubContent!="undefined"){
			document.getElementById(menuitems[i].getAttribute("rel")).style.display="none";
		}
	}
	targetitem.className="current";
	if(typeof targetitem.hasSubContent!="undefined"){
		document.getElementById(targetitem.getAttribute("rel")).style.display="block";
	}
},
isSelected:function(menuurl){
	menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "");
	return (ddtabmenu.currentpageurl==menuurl);
},
isContained:function(m,e){
	e=window.event || e;
	var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement);
	while (c && c!=m){try {c=c.parentNode;} catch(e){c=m;}}
	if (c==m) {
		return true;
	}else {
		return false;
	}
},
revert2default:function(outobj, tabid, e){
	if (!ddtabmenu.isContained(outobj, tabid, e)){
		window["hidetimer_"+tabid]=setTimeout(function(){
			ddtabmenu.showsubmenu(tabid, ddtabmenu[tabid+"-dselected"]);
		}, ddtabmenu.snap2original[1]);
	}
},
clearrevert2default:function(tabid){
if(typeof window["hidetimer_"+tabid]!="undefined"){
	clearTimeout(window["hidetimer_"+tabid]);
}
},
addEvent:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
	tasktype=(window.addEventListener)? tasktype : "on"+tasktype;
	if (target.addEventListener) {
		target.addEventListener(tasktype, functionref, false);
	}else if(target.attachEvent) {
		target.attachEvent(tasktype, functionref);
	}
},
init:function(tabid, dselected){
	var menuitems=document.getElementById(tabid).getElementsByTagName("a");
	this[tabid+"-menuitems"]=menuitems;
	for(var x=0;x<menuitems.length;x++){
		if(menuitems[x].getAttribute("rel")){
			this[tabid+"-menuitems"][x].hasSubContent=true;
			if(ddtabmenu.disabletablinks){
				menuitems[x].onclick=function(){return false;};
			}
			if(ddtabmenu.snap2original[0]===true){
				var submenu=document.getElementById(menuitems[x].getAttribute("rel"));
				menuitems[x].onmouseout=function(e){ddtabmenu.revert2default(submenu,tabid,e);};
				submenu.onmouseover=function(){ddtabmenu.clearrevert2default(tabid);};
				submenu.onmouseout=function(e){ddtabmenu.revert2default(this,tabid,e);};
			}
		}else{//for items without a submenu, add onMouseout effect
			menuitems[x].onmouseout=function(e){this.className="";if(ddtabmenu.snap2original[0]===true){ddtabmenu.revert2default(this,tabid,e);}};
		}
		menuitems[x].onmouseover=function(){ddtabmenu.showsubmenu(tabid, this);};
		if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[x].href)){
			ddtabmenu.showsubmenu(tabid, menuitems[x]);
			this[tabid+"-dselected"]=menuitems[x];
			var setalready=true;
		}else if(parseInt(dselected,10)==x){
			ddtabmenu.showsubmenu(tabid, menuitems[x]);
			this[tabid+"-dselected"]=menuitems[x];
		}
	}
}
};