function swap(iid)
	{
		oitem = document.getElementById(iid);
		alert(oitem.style.backgroundImage);
		if ( oitem.style.backgroundImage != url("images/menu/"+iid+"_on.jpg") )
			oitem.style.backgroundImage = url("images/menu/"+iid+"_on.jpg");
		else 
			oitem.style.backgroundImage = url("images/menu/"+iid+".jpg");
	}