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) {
  about_over = newImage("/images/about_over.gif");
  about = newImage("/images/about.gif");
  services = newImage("/images/services.gif");
  services_over = newImage("/images/services_over.gif");
  gallery = newImage("/images/gallery.gif");
  gallery_over = newImage("/images/gallery_over.gif");
  links = newImage("/images/links.gif");
  links_over = newImage("/images/links_over.gif");
  contact = newImage("/images/contact.gif");
  contact_over = newImage("/images/contact_over.gif");
  bnr_main_over = newImage("/images/bnr_about.gif");
  bnr_main_over023 = newImage("/images/bnr_services.gif");
  bnr_main_over024 = newImage("/images/bnr_gallery.gif");
  bnr_main_over025 = newImage("/images/bnr_links.gif");
  bnr_main_over026 = newImage("/images/bnr_contact.gif");
  preloadFlag = true;
 }
}