undefined object crashes IE
if (typeof adSource != "undefined") {adSource = adSource + "&f1=" + installedVer...
from
<script type="text/javascript">
<!--
var adSource="http://gcc-08.googleadservices.com/gcc/tag?s=1964&g=344&mp=284&a=284&t="+(new Date).getTime()+"&crp="+Math.random();
if (typeof adSource != "undefined") {adSource = adSource + "&f1=" + installedVer.major + "&f2=" + installedVer.minor; }
document.write('<ifr' + 'ame scrolling="no" frameborder="0" marginwidth="0" marginheight="0" width="336" height="280" src="' + adSource + '"></ifr' + 'ame>');
// -->
</script>
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