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) {
		main_over = newImage("menu/main-over.gif");
		uniSearch_over = newImage("menu/uniSearch-over.gif");
		options_over = newImage("menu/options-over.gif");
		help_over = newImage("menu/help-over.gif");
		query_over = newImage("menu/query-over.gif");
		find_button_over = newImage("menu/find_button-over.gif");
		clear_button_over = newImage("menu/clear_button-over.gif");
		search_query_over = newImage("menu/search_query-over.gif");
		SI_folder_over = newImage("menu/SI_folder-over.gif");
		contacts_over = newImage("menu/contacts-over.gif");
		preloadFlag = true;
	}
}