window.addEvent('domready', function() {
	var mainMenu = $('mainMenu');
	var moveVertical = {property: 'top', duration: 'short'};
	mainMenu.getElements('a').each(function(anchor) {
		var img = anchor.getFirst();
		var label = img.getNext();
		label.set('opacity', 0);
		label.setStyles({position: 'relative', top: -1*label.getSize().y});
		img.setStyles({position: 'relative', top: 0});
		img.set('tween', moveVertical)
		anchor.addEvent('mouseenter', function() {
			img.tween(-1*label.getSize().y);
			label.fade('in');
		});
		anchor.addEvent('mouseleave', function() {
			img.tween(0);
			label.fade('out');
		});
	});
});