function dynamicButtons (buttonIndex, buttonImage)
{
  document.images[buttonIndex].src = buttonImage.src;
}

var ueberUns1=new Image();
ueberUns1.src="ueberUns1.png";
var ueberUns2=new Image();
ueberUns2.src="ueberUns2.png";

var partner1=new Image();
partner1.src="partner1.png";
var partner2=new Image();
partner2.src="partner2.png";

var karriere1=new Image();
karriere1.src="karriere1.png";
var karriere2=new Image();
karriere2.src="karriere2.png";

var kontakt1=new Image();
kontakt1.src="kontakt1.png";
var kontakt2=new Image();
kontakt2.src="kontakt2.png";