var nr = 3;
	var ad;
	ad=Math.floor(nr*Math.random());
	if (ad==0) {
		url="http://www.vivesco.de";
		banner="http://ad.gesundheit.de/ad/adview.php?clientid=143&n=a55225de";
	}
	if (ad==1) {
		url="http://www.markusnoll.de";
		banner="468x60_markusnoll.jpg";
	}
	if (ad==2) {
		url="http://www.gesundheit.de";
		banner="http://www.gesundheit.de/uploads/pics/468_gesundheit_02.gif";
	}
document.write('<center><a href=\"' + url + '\" target=_blank><img src=\"'+ banner +'\" width=468></a></center>');