function newImage(arg) {
 if (document.images) {
  rslt = new Image();
  rslt.src = arg;
  return rslt;
 }
}

function change_images() {
 if (document.images && (preloadFlag == true)) {
  for (var i=0; i<change_images.arguments.length; i+=2) {
   document[change_images.arguments[i]].src = change_images.arguments[i+1];
  }
 }
}

var preloadFlag = false;
function preload_images() {
 if (document.images) {
  aboutus_f2 = newImage("images/nav_aboutus_f2.gif");
  camper_f2 = newImage("images/nav_camper_f2.gif");
  commercial_f2 = newImage("images/nav_commercial_f2.gif");
  grillon_f2 = newImage("images/nav_grillon_f2.gif");
  grill_f2 = newImage("images/nav_grill_f2.gif");
  home_f2 = newImage("images/nav_home_f2.gif");
  information_f2 = newImage("images/nav_information_f2.gif");
  insect_f2 = newImage("images/nav_insect_f2.gif");
  locations_f2 = newImage("images/nav_locations_f2.gif");
  ordering_f2 = newImage("images/nav_ordering_f2.gif");
  safety_f2 = newImage("images/nav_safety_f2.gif");
  send_f2 = newImage("images/nav_send_f2.gif");

  vieworder_over = newImage("images/nav_vieworder_over.gif");
  login_over = newImage("images/nav_login_over.gif");
  create_over = newImage("images/nav_create_over.gif");
  privacy_over = newImage("images/nav_privacy_over.gif");
  help_over = newImage("images/nav_help_over.gif");
  
  btn_20heater_over = newImage("images/btn_grill_f2.jpg");
  btn_20insect_over = newImage("images/btn_insect_f2.jpg");
  btn_rv_over = newImage("images/btn_30lb_f2.jpg");
  preloadFlag = true;
 }
}