about1 = new Image();
about1.src = "images/nav_about_over.gif";
services1 = new Image();
services1.src = "images/nav_services_over.gif";
products1 = new Image();
products1.src = "images/nav_products_over.gif";
links1 = new Image();
links1.src = "images/nav_links_over.gif";