function checkform ( form )
{
  if (form.Name.value == "") {
    alert( "Please enter your Name." );
    form.Name.focus();
    return false ;
  }
 if (form.TelNo.value == "") {
    alert( "Please enter your Telephone Number." );
    form.TelNo.focus();
    return false ;
  }
  return true ;
}