duo = new Image(); 
  duo.src = "../images/uebers2.jpg"; 
  duoHigh = new Image(); 
  duoHigh.src = "../images/uebers2_grau.jpg"; 

  oko = new Image(); 
  oko.src = "../images/uebers1.jpg"; 
  okoHigh = new Image(); 
  okoHigh.src = "../images/uebers1_grau.jpg";

  pyrot = new Image(); 
  pyrot.src = "../images/uebers3.jpg"; 
  pyrotHigh = new Image(); 
  pyrotHigh.src = "../images/uebers3_grau.jpg";

  pyrotec = new Image(); 
  pyrotec.src = "../images/uebers4.jpg"; 
  pyrotecHigh = new Image(); 
  pyrotecHigh.src = "../images/uebers4_grau.jpg";

 
 function Bildwechsel(Bildnr,Bildobjekt)

	{
	document.images[Bildnr].src = Bildobjekt.src;
	}