window.addEvent('domready', function() {
	$$('img.mouseover').each(function(img) {
		var src = img.getProperty('src');
		var ext = src.substring(src.lastIndexOf('.'), src.length);
		img.addEvent('mouseenter', function() {
			img.setProperty('src', src.replace(ext, '-mo' + ext));
		});
		img.addEvent('mouseleave', function() {
			img.setProperty('src', src);
		});
	});
});