function cat_init() {
	var div = document.getElementById("catalog");
	if (!div) div = document.getElementById("random");
	var imgs = div.getElementsByTagName("img");
	for (i=0; i<imgs.length; i++) {
		if (imgs[i].parentNode.tagName=="A") {
			imgs[i].onmouseover = function() {
				this.parentNode.parentNode.style.cssText = "background: url('/images/catalog-over.jpg') no-repeat";
			}
			imgs[i].onmouseout = function() {
				this.parentNode.parentNode.style.cssText = "";
			}
		}
	}
}
cat_init();