updating a form after Ajax

[PeejAvery]

In the popup window...

<script type="text/javascript">
function repopulatebox(){
  // grab the combo
  var theCombo = window.opener.document.getElementById('ID of <select>');
  // truncate the combo
  theCombo.length = 0;
  // now repopulate the list. you can use ASP.NET to write this JS part.
  .....
}
</script>