window.addEvent('domready', function() {
	
	
//this code needs to be updated
//from
//http://forum.mootools.net/viewtopic.php?pid=28886
$$('.roll').each(function(el, i)
{
var src = el.getProperty('src');
var extension = src.substring(src.lastIndexOf('.'),src.length)

    el.addEvent('mouseenter', function() { this.setProperty('src', src.replace(extension, '_over' + extension) ); });
    el.addEvent('mouseleave', function() { this.setProperty('src', src); });
/*
	var ExampleFx = new Fx.Style(el, 'opacity', { 
	wait: false,
	duration: 400,
	transition: Fx.Transitions.Quart.easeInOut});
		el.addEvent('mouseenter', function() { ExampleFx.start(1, 0.01); });
		el.addEvent('mouseleave', function() { ExampleFx.start(0.01, 1); });
*/
});



});//end domready