window.addEvent('domready', function() {
		/* example a:  top down */
		$$('#menu a').each(function(el) {
			//fx
			var fx = new Fx.Tween(el,{
				duration: 300,
				link: 'cancel'
			});
			//css & events
			el.setStyle('background-position','-20px 35px').addEvents({
				'mouseenter': function(e) {
					e.stop();
					fx.start('background-position','-20px 94px');
				},
				'mouseleave': function(e) {
					e.stop();
					fx.start('background-position','-20px 35px');
				}
			});
		});
	});