window.addEvent('domready', function() {
	
	var list = $$('#main_nav li a');
	list.each(function(element) {
		
		if (element.className != "active") {

			var fx = new Fx.Styles(element, {duration:150, wait:false});

			element.addEvent('mouseenter', function(){
				fx.start({
					'borderBottomWidth': 18, 'height': 35
				});
			});

			element.addEvent('mouseleave', function(){
				fx.start({
					'borderBottomWidth': 6, 'height': 47
				});
			});
		
		}

	});

});