window.addEvent('domready', function(){
	var list = $$('#side_menu ul li a');
	list.each(function(element) {
		
		var fx = new Fx.Styles(element, {duration:200, wait:false});
		
		element.addEvent('mouseenter', function(){
			fx.start({
				'margin-left': 0
			});
		});
		
		element.addEvent('mouseleave', function(){
			fx.start({
				'margin-left': -50
			});
		});
		
	});
});