sub missing_fields_output {
  my ($self, @missing) = @_;

  if ( $self->{FormConfig}{'missing_fields_redirect'} ) {
    print $self->cgi_object->redirect($self->{FormConfig}{'missing_fields_redirect'});
  }
  else {
    my $missing_field_list = join '',
                             map { '<li>' . $self->escape_html($_) . "</li>\n" }
                             @missing;
    $self->error_page( 'Error: Blank Fields', <<END );
<p>
    The following fields were left blank in your submission form:
</p>
<div class="c2">
   <ul>
     $missing_field_list
   </ul>
</div>
<p>
    These fields must be filled in before you can successfully
    submit the form.
</p>
<p>
    Please use your back button to return to the form and
    try again.
</p>
END
  }
}