function switchImage(ImageName,ImageSrc){
	window.document.images[ImageName].src = ImageSrc;
	}
	
function openWin(URL, winName, left, top, width, height) {
  if (window.Fenster && !Fenster.closed) {
    Fenster.focus();
	return true; }
  Fenster = window.open(URL, winName, "left="+left+",top="+top+",width="+width+",height="+height);
  }