t2		= new Image();
t2.src	= 'images/navi-02.gif';
p2		= new Image();
p2.src	= 'images/navi02.gif';
t3		= new Image();
t3.src	= 'images/navi-03.gif';
p3		= new Image();
p3.src	= 'images/navi03.gif';
t4		= new Image();
t4.src	= 'images/navi-04.gif';
p4		= new Image();
p4.src	= 'images/navi04.gif';
function Bildwechsel(Zielbild,Bildobjekt) {
  Zielbild.src = Bildobjekt.src;
}