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

	revealsubmenu:function(curtabref, menuname){
	if (curtabref.getAttribute("rel") != menuname) {
		this.hideallsubs()
		if (this.last_accessed_tab!=null)
			if (this.last_accessed_tab.getAttribute("rel") != menuname)
				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"
		curtabref.className="current"
		this.last_accessed_tab=curtabref
	}
	},

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

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

	init:function(menuId, selectedIndex, menuname){
	var tabItems=document.getElementById(menuId).getElementsByTagName("a")
		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
				tabItems[i].className="questo"
				this.revealsubmenu_init(tabItems[i])
			}
		tabItems[i].onmouseover=function(){
		menu.revealsubmenu(this, menuname)
		}
		} //END FOR LOOP
	}
}