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) {
  smc_repair_over = newImage("images/smc_repair_over.gif");
  panel_bonding_over = newImage("images/panel_bonding_over.gif");
  plastic_repair_over = newImage("images/plastic_repair_over.gif");
  sealers_foam_over = newImage("images/sealers_foam_over.gif");
  buzz_over = newImage("images/buzz_over.gif");
  downloads_over = newImage("images/downloads_over.gif");
  contact_over = newImage("images/contact_over.gif");
  preloadFlag = true;
 }
}