function onMenuMouseOver(e) {
	this.className+=" hover";
}

function onMenuMouseOut(e) {
	this.className=this.className.replace(new RegExp("( )*hover\\b"), "");
}

function setupMenu(e) {
	var menus = document.getElementById("menu").getElementsByTagName("li");
	YAHOO.util.Event.addListener(menus, "mouseover", onMenuMouseOver); 
	YAHOO.util.Event.addListener(menus, "mouseout", onMenuMouseOut); 
}

YAHOO.util.Event.onAvailable("afterMenu", setupMenu);