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("nav/home-over.png");
  cider_over = newImage("nav/cider-over.png");
  wine_over = newImage("nav/wine-over.png");
  american_fruits_over = newImage("nav/american_fruits-over.png");
  tasting_room_over = newImage("nav/tasting_room-over.png");
  music_over = newImage("nav/music-over.png");
  marketplace_over = newImage("nav/marketplace-over.png");
  pane_over = newImage("nav/pane-over.png");
  history_over = newImage("nav/history-over.png");
  where_to_buy_over = newImage("nav/where_to_buy-over.png");
  weddings_over = newImage("nav/weddings-over.png");
  directions_over = newImage("nav/directions-over.png");
  lodgings_over = newImage("nav/lodgings-over.png");
  contact_over = newImage("nav/contact-over.png");
  preloadFlag = true;
 }
}