GA Custom Variable AdWords Tracking

<script type='text/javascript'>
//Check if supplied parameter exists in query string
function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}


if(gup('gclid')!="" && gup('gaw_campaign')!="" && gup('gaw_term')!="") {
    _gaq.push(['_setCustomVar',1,'GAWCampaign',gaw_campaign,1]);
    _gaq.push(['_setCustomVar',2,'GAWTerm',gaw_term,1]);
}
</script>