window.addEvent('domready', function() {
	var preloader = [];
	var i = 0;
	$$('#center a.hover img').each(function(el){
        el.addEvent('mouseover', function(){
			this.setProperty('src', this.getProperty('src').replace('.png', '_active.png'));
        });
        el.addEvent('mouseleave', function(){
			this.setProperty('src', this.getProperty('src').replace('_active', ''));
        });
        preloader[i++] = new Asset.image(el.getProperty('src').replace('.png', '_active.png'));
	});
});