window.addEvent('domready', function() {
 	if ($('menuPrincipal')) { 
		var myMenu = new MenuMatic({id:'menuPrincipal',opacity:99});
	}
	new SmoothScroll({duration:500});
 	$('irArriba').set('opacity','0').setStyle('display','block');
 	var ss = new ScrollSpy({
		min: 200,
		onEnter: function(position,enters) {
 			$('irArriba').fade('in');
		},
		onLeave: function(position,leaves) {
 			$('irArriba').fade('out');
		},
		onTick: function(position,state,enters,leaves) {
 		},
		container: window
	});
});