function checkform ( form )
{
  // see http://www.thesitewizard.com/archive/validation.shtml
  // for an explanation of this script and how to use it on your
  // own website

  // ** START **
	
	if(document.frmSearch.txtSearch.value == "")
		{
			alert('Please enter a value into the "Directory Search" field');
			document.frmSearch.txtSearch.focus();
			return false;
		}
	
  	return true;
}