/**
 * @author Kris
 */
YAHOO.util.Event.onContentReady("top_nav", function () {
    var oMenuBar = new YAHOO.widget.MenuBar("top_nav", { 
                                                autosubmenudisplay: true, 
                                                hidedelay: 500, 
                                                lazyload: true });
    oMenuBar.render();
});