Home1=new Image();
Home1.src="images/home1.gif";
Home2=new Image();
Home2.src="images/home2.gif";
 Schule1=new Image();
 Schule1.src="images/schule1.gif";
 Schule2=new Image();
 Schule2.src="images/schule2.gif";
  Lehrer1=new Image();
  Lehrer1.src="images/lehrer1.gif";
  Lehrer2=new Image();
  Lehrer2.src="images/lehrer2.gif";
   Instrumente1=new Image();
   Instrumente1.src="images/instrumente1.gif";
   Instrumente2=new Image();
   Instrumente2.src="images/instrumente2.gif";
    Unterricht1=new Image();
    Unterricht1.src="images/unterricht1.gif";
    Unterricht2=new Image();
    Unterricht2.src="images/unterricht2.gif";
     Tarife1=new Image();
     Tarife1.src="images/tarife1.gif";
     Tarife2=new Image();
     Tarife2.src="images/tarife2.gif";
      Anfrage1=new Image();
      Anfrage1.src="images/anfrage1.gif";
      Anfrage2=new Image();
      Anfrage2.src="images/anfrage2.gif";
       Probestunde1=new Image();
       Probestunde1.src="images/probestunde1.gif";
       Probestunde2=new Image();
       Probestunde2.src="images/probestunde2.gif";
        Email1=new Image();
        Email1.src="images/email1.gif";
        Email2=new Image();
        Email2.src="images/email2.gif";
var a, Bild;
function tauschen (a,Bild) {
window.document.images[a].src=Bild.src;

}