<!--

function getPositions(){

var posx = screen.width/2;
var posy = screen.height/2;
var xtposx = posx - 462;
var index = 0;
var zzahl = 0;
var number = 1;
var image = "Center" + number + ".jpg";

posx = posx - 1024/2;
posy = posy - 141;

zzahl = Math.random();

if(zzahl < 0.25)
		 image = "Center1.jpg";
if(zzahl < 0.50 && zzahl > 0.25)
		 image = "Center2.jpg";
if(zzahl < 0.75 && zzahl > 0.50)
		 image = "Center3.jpg";
if(zzahl < 1.00 && zzahl > 0.75)
		 image = "Center4.jpg";

window.document.images[index].src = [image];

document.getElementById("center").style.left = posx;
document.getElementById("center").style.top = posy;
document.getElementById("xt").style.left = xtposx;
}

//-->