startList = function() {
	navRoot = document.getElementById("top_nav");
	elems = navRoot.getElementsByTagName("li");
	for (i=0; i < elems.length; i++) {
		node = elems[i];
		var orig_mouse_over = node.onmouseover;
		var orig_mouse_out = node.onmouseout;
		node.onmouseover=function() {
			$('homeDesignImage').addClassName('makeinvisible');;
			children = this.childNodes;
			for(i = 0; i < children.length; i++) {
				if(children[i].nodeName == 'UL') {
					Element.addClassName(children[i], "over");
				}
			}
		}  
		node.onmouseout=function() {
			children = this.childNodes;
			$('homeDesignImage').removeClassName('makeinvisible');;
			for(i = 0; i < children.length; i++) {
				if(children[i].nodeName == 'UL') {
					Element.removeClassName(children[i], "over");
				}
			}
		}
	}
}