function menus_init() { 
	var dom = YAHOO.util.Dom;
	var ev = YAHOO.util.Event;
	var els = dom.getElementsByClassName('dropdown', 'li');
	for (var i=0; i<els.length; i++)
	{
		ev.addListener(els[i], 'mouseout', dom.removeClass(els[i], "over"));
		ev.addListener(els[i], 'mouseover', dom.addClass(els[i], "over");
	}
}
YAHOO.util.Event.addListener(window, "load", menus_init);