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

	var arrImg = $$('#menu img');
	   
	arrImg.each(Init = function (elem, index) {
		
		var theSrc = elem.get('src');
		theSrc = theSrc.replace('.btn.jpg', '');
	
		elem.addEvent('mouseover', function(e) {
			e.stop();
			elem.set('src', theSrc + '.hover.jpg');
		});
			
		elem.addEvent('mouseout', function(e) {
			e.stop();
			elem.set('src', theSrc + '.btn.jpg');
		});
		
	});
	
});