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) {
    ueber2 = newImage("images/ueber2.gif");
    bewerber2 = newImage("images/bewerber2.gif");
    kunden2 = newImage("images/kunden2.gif");
    jobs2 = newImage("images/jobs2.gif");
    kontakt2 = newImage("images/kontakt2.gif");
    aktuelles2 = newImage("images/aktuelles2.gif");
    impressum2 = newImage("images/impressum2.gif");
    up2 = newImage("images/up2.gif");
    button_wetter = newImage("images/button_wetter.gif");
    button_wetter_aus = newImage("images/button_wetter_aus.gif");
    preloadFlag = true;
  }
}