window.addEvent('load', function() {

	var l = $('feed_btn').getChildren('ul')[0];
	var myfx = new Fx.Tween(l, {property: 'opacity'});

	$('feed_btn').addEvent('mouseover', function() {

		l.style.display = 'block';
		myfx.cancel();
		myfx.start(1);

	});

	$('feed_btn').addEvent('mouseout', function() {

		myfx.cancel();
		myfx.start(0).chain(function() { l.setStyle('display', 'none'); });
		

	});

})