// JavaScript Document<script type="text/javascript">
window.addEvent('domready', function() {

var images = [];

$$('img.roll').each(function(img) {
var src = img.getProperty('src');
var extension = src.substring(src.lastIndexOf('.'),src.length)
var srch = src.replace(extension,'-on' + extension);
images.include(srch);
img.addEvent('mouseenter', function() { img.setProperty('src',srch); });
img.addEvent('mouseleave', function() { img.setProperty('src',src); });
});

var loader = new Asset.images(images);

});