function newImage(arg) {
			if (document.images) {
				rslt = new Image();
				rslt.src = arg;
				return rslt;
			}
		}
		
		function changeImages() {
			if (document.images && (preloadFlag == true)) {
				for (var i=0; i<changeImages.arguments.length; i+=2) {
					document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
				}
			}
		}
		
			var preloadFlag = false;
		function preloadImages() {
			if (document.images) {
				search_over = newImage("/images/layout/search-over.gif");
				buy_over = newImage("/images/layout/buy-over.gif");
				sell_over = newImage("/images/layout/sell-over.gif");
				view_over = newImage("/images/layout/view-over.gif");
				comm_over = newImage("/images/layout/comm-over.gif");
				reloc_over = newImage("/images/layout/reloc-over.gif");
				other_over = newImage("/images/layout/other-over.gif");
				about_over = newImage("/images/layout/about-over.gif");
				agent_over = newImage("/images/layout/agent-over.gif");
				contact_over = newImage("/images/layout/contact-over.gif");
				tour_over = newImage("/images/layout/tour-over.gif");
				preloadFlag = true;
			}
		}