var Bisk1 = new Image();
Bisk1.src ="../pics/grograss.jpg";

 
var Bisk2 = new Image ();
Bisk2.src = "../pics/growolke.jpg";

var Bisk3 = new Image ();
Bisk3.src = "../pics/groweizen.jpg";

var Bisk4 = new Image ();
Bisk4.src = "../pics/groschwein.jpg";
 
var Bisk5 = new Image ();
Bisk5.src = "../pics/groerbsen.jpg";

var Bisk6 = new Image ();
Bisk6.src = "../pics/groheu.jpg";

var Bisk7 = new Image ();
Bisk7.src = "../pics/grohahn.jpg";
 
 
function wechse1()
{window.document.images [8].src=Bisk2.src;}
function wechse2()
{window.document.images [8].src=Bisk1.src;}
function wechse3()
{window.document.images [8].src=Bisk3.src;}
function wechse4()
{window.document.images [8].src=Bisk4.src;}
function wechse5()
{window.document.images [8].src=Bisk5.src;}
function wechse6()
{window.document.images [8].src=Bisk6.src;}
function wechse7()
{window.document.images [8].src=Bisk7.src;}