//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: [false, 300], //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")
},

checkLastTab:function(tabid) {
	var menuitems=this[tabid+"-menuitems"];	
	for (i = 0; i < menuitems.length; i++) {
		menuitems[i].isLastTab = false;
	}
	for (i = menuitems.length-1; i >= 0 ; i--) {
		if (menuitems[i].isDisabledByMe == false) {
			menuitems[i].isLastTab = true;
			break;
		}
	}
},

checkAllVisited:function(tabid){
	var allvisited = true;
	var menuitems=this[tabid+"-menuitems"];
	for (i=0; i<menuitems.length; i++){
		if (menuitems[i].isVisited == false) {
			allvisited = false;
			break;
		}
	}
	return allvisited;
},

showsubmenu:function(tabid, targetitem){
	var menuitems=this[tabid+"-menuitems"]
	this.clearrevert2default(tabid)
 for (i=0; i<menuitems.length; i++){
		menuitems[i].className=""
		menuitems[i].parentNode.id=""
		if (typeof menuitems[i].hasSubContent!="undefined")
			document.getElementById(menuitems[i].getAttribute("rel")).style.display="none"
	}
	targetitem.isVisited = true
	targetitem.className="current"
	targetitem.parentNode.id="current"
	if (typeof targetitem.hasSubContent!="undefined")
		document.getElementById(targetitem.getAttribute("rel")).style.display="block"
		//targetitem.style.backgroundPositionX = "-50px";
	if (this.nexttablink) {
		if (targetitem.isLastTab == true) {
			this.nexttablink.style.display='none';
		} else {
			this.nexttablink.style.display='inline';			
		}
	}
},

disableItem:function(tabid, targetitem) {
	var menuitems=this[tabid+"-menuitems"];
	for (i = 0; i < menuitems.length; i++) {
		if (menuitems[i].subContent == targetitem) {
			menuitems[i].isDisabledByMe = true;
			menuitems[i].isVisited = true;
		}
	}
	this.checkLastTab(tabid);
}, 

enableItem:function(tabid, targetitem) {
	var menuitems=this[tabid+"-menuitems"];
	for (i = 0; i < menuitems.length; i++) {
		if (menuitems[i].subContent == targetitem) {
			menuitems[i].isDisabledByMe = false;
			menuitems[i].isVisited = false;			
		}
	}
	this.checkLastTab(tabid);	
},

isSelected:function(menuurl){
	var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "")
	return (ddtabmenu.currentpageurl==menuurl)
},

isContained:function(m, e){
	var 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)
	var 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")
	var nexttablink=document.getElementById('nexttablink')
	this.nexttablink = nexttablink;
	this.tabid = tabid;
	this[tabid+"-menuitems"]=menuitems
	for (var x=0; x<menuitems.length; x++){
		if (menuitems[x].getAttribute("rel")){
			this[tabid+"-menuitems"][x].hasSubContent=true
			this[tabid+"-menuitems"][x].isVisited=false
			this[tabid+"-menuitems"][x].isDisabledByMe=false
			this[tabid+"-menuitems"][x].isLastTab=(x==menuitems.length-1)?true:false;
			this[tabid+"-menuitems"][x].subContent=menuitems[x].getAttribute("rel")
			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)}
		menuitems[x].onclick=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)==x){
			ddtabmenu.showsubmenu(tabid, menuitems[x])
			this[tabid+"-dselected"]=menuitems[x]
		}
	}
}
}