Here is the tag we are using for the example.
<script type='text/javascript'><!--//<![CDATA[
var m3_u = (location.protocol=='https:'?'https://www.expandablebanners.com/openx/www/delivery/ajs.php':
'http://www.expandablebanners.com/openx/www/delivery/ajs.php');
var m3_r = Math.floor(Math.random()*99999999999);
if (!document.MAX_used) document.MAX_used = ',';
document.write ("<scr"+"ipt type='text/javascript' src='"+m3_u);
document.write ("?zoneid=1");
document.write ('&cb=' + m3_r);
if (document.MAX_used != ',') document.write ("&exclude=" + document.MAX_used);
document.write (document.charset ? '&charset='+document.charset : (document.characterSet ?
'&charset='+document.characterSet : ''));
document.write ("&loc=" + escape(window.location));
if (document.referrer) document.write ("&referer=" + escape(document.referrer));
if (document.context) document.write ("&context=" + escape(document.context));
if (document.mmm_fo) document.write ("&mmm_fo=1");
document.write ("'><\/scr"+"ipt>");
//]]>--></script><noscript><a href='http://www.expandablebanners.com/openx/www/delivery/ck.php?n=a6016bbf&cb=
INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://www.expandablebanners.com/openx/www/delivery/avw.php?
zoneid=1&cb=INSERT_RANDOM_NUMBER_HERE&n=a6016bbf' border='0' alt='' /></a>
</noscript>
Here a link to the example on it's own.