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) {
    home_over = newImage("images/home-over.gif");
    about_us_over = newImage("images/about-us-over.gif");
    collection_over = newImage("images/collection-over.gif");
    faq_over = newImage("images/faq-over.gif");
    links_over = newImage("images/links-over.gif");
    contact_us_over = newImage("images/contact-us-over.gif");
    preloadFlag = true;
  }
}