window.addEvent('domready', function() {
	
	$$('#mainmenu li').each(function(element){
		
			var fx = new Fx.Tween(element.getElement('a'), {duration:200, wait:false});

			element.addEvent('mouseenter', function(){
				fx.start(
					'margin-top',  -5
				);
			});

			element.addEvent('mouseleave', function(){
				fx.start(
					'margin-top', 0
				);
			});
		
		});
	
});