Problem between flash banner and search pop-up

[Cornolio]

(sent there by jake bunce.. http://www.vbulletin.com/forum/showthread.php?t=159309 )

go there: http://www.discutere.it/forumdisplay.php?f=3
click on "cerca" (search). the pop-up goes behind the flash banner

i used this code for the banner, can you help me?

<script language='JavaScript' type='text/javascript' src='http://www.discutere.it/adstats/adx.js'></script>
<script language='JavaScript' type='text/javascript'>
<!--
   if (!document.phpAds_used) document.phpAds_used = ',';
   phpAds_random = new String (Math.random()); phpAds_random = phpAds_random.substring(2,11);
  
   document.write ("<" + "script language='JavaScript' type='text/javascript' src='");
   document.write ("http://www.discutere.it/adstats/adjs.php?n=" + phpAds_random);
   document.write ("&amp;clientid=5");
   document.write ("&amp;exclude=" + document.phpAds_used);
   if (document.referrer)
      document.write ("&amp;referer=" + escape(document.referrer));
   document.write ("'><" + "/script>");
//-->
</script><noscript><a href='http://www.discutere.it/adstats/adclick.php?n=afe9d9a1' target='_blank'><img src='http://www.discutere.it/adstats/adview.php?clientid=5&amp;n=afe9d9a1' border='0' alt=''></a></noscript>

tnx