t1		= new Image();
t1.src	= 'cat01.gif';
p1		= new Image();
p1.src	= 'cat001.gif';
t2		= new Image();
t2.src	= 'cat02.gif';
p2		= new Image();
p2.src	= 'cat002.gif';
t3		= new Image();
t3.src	= 'cat03.gif';
p3		= new Image();
p3.src	= 'cat003.gif';
t4		= new Image();
t4.src	= 'cat04.gif';
p4		= new Image();
p4.src	= 'cat004.gif';
t5		= new Image();
t5.src	= 'cat05.gif';
p5		= new Image();
p5.src	= 'cat005.gif';
t6		= new Image();
t6.src	= 'cat06.gif';
p6		= new Image();
p6.src	= 'cat006.gif';
function Bildwechsel(Zielbild,Bildobjekt) {
  Zielbild.src = Bildobjekt.src;
}