var HoverImages = new Class({
    Implements: [Options],
    
    options: {
        large_selector: 'large',
        image_selectors: 'a[class=product_thumbnails]'
    },
    
    initialize: function() {
        ls = this.options.large_selector;
        $$(this.options.image_selectors).addEvent('mouseenter', function() {
            $(ls).set('src', this.get('href'));
        });
        $$(this.options.image_selectors).addEvent('click', function(e) {
            new Event(e).stop();
        });
    }
});

window.addEvent('domready', function() {
    var hover_images = new HoverImages();
});