var submenu_active 	= null;
	var active_object 	= null;
	
	function ShowSubmenu(theId){
		
		submenu_active = theId;
		document.getElementById(theId).style.display="block";

		theId = theId.replace('sub','btn');
		if(activeid && document.getElementById(theId).id != activeid) {
			document.getElementById(theId).src = siteroot+'images/mainmenu/'+theId+"_over.gif";
		}

	}
	
	function HideSubMenu(){
		document.getElementById(submenu_active).style.display="none";
		submenu_active = submenu_active.replace('sub','btn');
		
		
		if(activeid && document.getElementById(submenu_active).id != activeid) {
			document.getElementById(submenu_active).src = siteroot+'images/mainmenu/'+submenu_active+".gif";
		}
		
		submenu_active = null;


	}
	
	
	function SetMainMenu(groupname) {
		
		document.getElementById('btn_'+groupname).src=siteroot+'images/mainmenu/btn_'+groupname+"_on.gif";
		activeid='btn_'+groupname;
		
	}
	
	
	function MenuOver(obj){
	}
	
	function MenuOut(obj) {
	
	}