YAHOO.util.Event.onContentReady("mainvmenu", function () {
    var oMenu = new YAHOO.widget.Menu
    (   "mainvmenu", 
	{   position: "static", 
	    hidedelay: 750, 
	    lazyload: true, 
	    effect: { 
		effect: YAHOO.widget.ContainerEffect.FADE,
		duration: 0.25
	    } 
	}
    );
    oMenu.render();            
});