I00 = new Image();
I00.src = "images/start4_off.gif";

I01 = new Image();
I01.src = "images/start4_on.gif";

I10 = new Image();
I10.src = "images/lk_1_off.gif";

I11 = new Image();
I11.src = "images/lk_1_on.gif";

I20 = new Image();
I20.src = "images/lk_2_off.gif";
I21 = new Image();
I21.src = "images/lk_2_on.gif";

I30 = new Image();
I30.src = "images/lk_3_off.gif";
I31 = new Image();
I31.src = "images/lk_3_on.gif";

I40 = new Image();
I40.src = "images/lk_4_off.gif";
I41 = new Image();
I41.src = "images/lk_4_on.gif";



function AlterPic(Bildname,Bildobjekt){
                window.document.images[Bildname].src = Bildobjekt.src;
}