userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
 if (document.images) {
  rslt = new Image();
  rslt.src = arg;
  return rslt;
 }
}

function findElement(n,ly) {
 if (browserVers < 4)		return document[n];
 var curDoc = ly ? ly.document : document;
 var elem = curDoc[n];
 if (!elem) {
  for (var i=0;i<curDoc.layers.length;i++) {
   elem = findElement(n,curDoc.layers[i]);
   if (elem) return elem;
  }
 }
 return elem;
}

function changeImages() {
 if (document.images && (preloadFlag == true)) {
  var img;
  for (var i=0; i<changeImages.arguments.length; i+=2) {
   img = null;
   if (document.layers) {
    img = findElement(changeImages.arguments[i],0);
   }
   else {
    img = document.images[changeImages.arguments[i]];
   }
   if (img) {
    img.src = changeImages.arguments[i+1];
   }
  }
 }
}

var preloadFlag = false;
function preloadImages() {
 if (document.images) {
  AvailabilityOver = newImage("images/ButtonAvailabilityOver.gif");
  ContactOver = newImage("images/ButtonContactOver.gif");
  DetailsOver = newImage("images/ButtonDetailsOver.gif");
  HomeOver = newImage("images/ButtonHomeOver.gif");
  KalkanOver = newImage("images/ButtonKalkanOver.gif");
  PhotosOver = newImage("images/ButtonPhotosOver.gif");
  RatesOver = newImage("images/ButtonRatesOver.gif");
  GuestCommentsOver = newImage("images/ButtonGuestCommentsOver.gif");
  PracticalitiesOver = newImage("images/ButtonPracticalitiesOver.gif");
  VerfugbarkeitOver = newImage("images/ButtonVerfugbarkeitOver.gif");
  KontaktOver = newImage("images/ButtonKontaktOver.gif");
  WeitereOver = newImage("images/ButtonWeitereOver.gif");
  StartseiteOver = newImage("images/ButtonStartseiteOver.gif");
  FotosOver = newImage("images/ButtonFotosOver.gif");
  PreiseOver = newImage("images/ButtonPreiseOver.gif");
  PraktischeHinweiseOver = newImage("images/ButtonPraktischeHinweiseOver.gif");
  
  preloadFlag = true;
 }
}