var ad = new Array()
ad[0] = 'rotation.yoomedia.de/l-adrotation.php?rotid=1269151328&sid=5824';
ad[1] = 'www.tip-ads.de/werbeanzeige/rotation.php?code=hh6u3&usubid=';
					
var xy = Math.floor(Math.random()*ad.length);
var zufall1 = Math.floor(Math.random()*5);
var zufall2 = Math.floor(Math.random()*5);
if (zufall1 == zufall2) {
   document.write("<div style='position: absolute; top: 100px; left: 50px;'><script type='text/javascript' language='Javascript' src='http://" + ad[xy] + "'></" + "script></div>");
   } else {
   document.write("");
   }