function change (a, Bild)
	{
	window.document.images[a].src = Bild.src;
	}
	// Hauptbilder vorladen
	s1 = new Image();
	s1.src="img/1-1.gif";
	s1a = new Image();
	s1a.src="img/1-2.gif";
	s2 = new Image();
	s2.src="img/2-1.gif";
	s2a = new Image();
	s2a.src="img/2-2.gif";
	s3 = new Image();
	s3.src="img/3-1.gif";
	s3a = new Image();
	s3a.src="img/3-2.gif";
	s4 = new Image();
	s4.src="img/4-1.gif";
	s4a = new Image();
	s4a.src="img/4-2.gif";
	s5 = new Image();
	s5.src="img/5-1.gif";
	s5a = new Image();
	s5a.src="img/5-2.gif";
	s6 = new Image();
	s6.src="img/6-1.gif";
	s6a = new Image();
	s6a.src="img/6-2.gif";
	s7 = new Image();
	s7.src="img/7-1.gif";
	s7a = new Image();
	s7a.src="img/7-2.gif";
	s8 = new Image();
	s8.src="img/8-1.gif";
	s8a = new Image();
	s8a.src="img/8-2.gif";
	s9 = new Image();
	s9.src="img/9-1.gif";
	s9a = new Image();
	s9a.src="img/9-2.gif";