var tabs={
	subcontainers:[], last_accessed_tab:null,

	revealsubmenu:function(curtabref){
		
		
		
		
		this.hideallsubs()
		
		if (this.last_accessed_tab!=null)
			this.last_accessed_tab.className=""
		
		if (curtabref.getAttribute("rel")){ //If there's a sub menu defined for this tab item, show it
			
			document.getElementById(curtabref.getAttribute("rel")).style.display="block"
				
				if (curtabref.getAttribute("rel")=="link1"){
					curtabref.className="firstOver"
				}
				else if (curtabref.getAttribute("rel")=="link4"){
					curtabref.className="lastOver"
				}
				else{
					
					curtabref.className="current"
					var tabItems2=document.getElementById("nav").getElementsByTagName("a")
					for (var i=0; i<tabItems2.length; i++){
						if (tabItems2[i].getAttribute("rel"))
							this.subcontainers[this.subcontainers.length]=tabItems2[i].getAttribute("rel") //store id of submenu div of tab menu item
							
							tabItems2[0].className="first"
							tabItems2[4].className="last"
		
						}
				}
			
			this.last_accessed_tab=curtabref
			
		}
	},

	hideallsubs:function(){
	for (var i=0; i<this.subcontainers.length; i++)
		document.getElementById(this.subcontainers[i]).style.display="none"
	},

	init:function(menuId, selectedIndex){
	var tabItems=document.getElementById(menuId).getElementsByTagName("a")
	//alert(document.getElementById(menuId).getElementsByTagName("a").getElementById("link1"));
		for (var i=0; i<tabItems.length; i++){
			if (tabItems[i].getAttribute("rel"))
				this.subcontainers[this.subcontainers.length]=tabItems[i].getAttribute("rel") //store id of submenu div of tab menu item
				
			if (i==selectedIndex){ //if this tab item should be selected by default
					if (i==0){
						tabItems[0].className="firstOver"
					}
					else if(i==4){
						tabItems[4].className="lastOver"	
					}
					else
					{
						tabItems[i].className="current"	
					}
					
				this.revealsubmenu(tabItems[i])			
			}
			
		tabItems[i].onmouseover=function(){
		tabs.revealsubmenu(this)

		}
		
		} //END FOR LOOP
	}

}