<!-- hide 
  if (document.images) {
  home_on = new Image(52 ,29); home_on.src = "../images/nav/home_on.gif";
  home_off = new Image(52 ,29); home_off.src = "../images/nav/home_off.gif";
  about_on = new Image(70 ,17); about_on.src = "../images/nav/about_on.gif";
  about_off = new Image(70 ,17); about_off.src = "../images/nav/about_off.gif";
  sales_off = new Image(72 ,17); sales_off.src = "../images/nav/sales_on.gif";
  sales_on = new Image(72 ,17); sales_on.src = "../images/nav/sales_off.gif";
  service_on = new Image(82 ,17); service_on.src = "../images/nav/service_on.gif";
  service_off = new Image(82 ,17); service_off.src = "../images/nav/service_off.gif";
  contact_on = new Image(81 ,17); contact_on.src = "../images/nav/contact_on.gif";
  contact_off = new Image(81 ,17); contact_off.src = "../images/nav/contact_off.gif";
  }
  // stop hiding -->