window.addEvent('domready', function() {
		var preload = new Array();
		var c = 0;
		$$('img.mo').each(function(img) {  
			var src = img.getProperty('src'); 
			var extension = src.substring(src.lastIndexOf('.'),src.length);
			var rollsrc = src.replace(extension,'-r' + extension);
			preload[c] = new Image();
			preload[c].src = rollsrc;
			c++;
			img.addEvent('mouseenter', function() { img.setProperty('src',rollsrc); });  
			img.addEvent('mouseleave', function() { img.setProperty('src',src); });  
		});
	});