window.addEvent('domready', function(){
	document.getElements('#twitter a').addEvent('mouseenter', function(e){
		e = new Event(e).stop();
		this.getElement('img').setProperty('src', '/resources/twitter_on.png');
	}).addEvent('mouseleave', function(e){
		e = new Event(e).stop();
		this.getElement('img').setProperty('src', '/resources/twitter_off.png');
	});
});