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) {
    big_logo_redesign_over = newImage("images/big_logo-redesign_over.jpg");
    design_over = newImage("images/design-over.gif");
    hosting_over = newImage("images/hosting-over.gif");
    management_over = newImage("images/management-over.gif");
    redesign_over = newImage("images/redesign-over.gif");
    placement_over = newImage("images/placement-over.gif");
    marketing_over = newImage("images/marketing-over.gif");
    preloadFlag = true;
  }}