function attachRollovers() {
	navs = $A(document.getElementById('nav-list').getElementsByTagName('img'));
	navs.push(document.getElementById('shop-image'));

	navs.each(function(nav) {
		// preload
		pic = new Image;
		pic.src = nav.getAttribute('src').replace('.gif', '-over.gif');
		
		// setup rollover
		nav.onmouseover = function() {
			this.setAttribute('src', this.getAttribute('src').replace('.gif', '-over.gif'));
		}
		nav.onmouseout = function() {
			this.setAttribute('src', this.getAttribute('src').replace('-over.gif', '.gif'));
		}
	});
}
Event.observe(window, 'load', attachRollovers);