Drupal 6 - Display the Form ID of every form in the form in a text box.

form_id_textfield.php

<?php
$form['form_id_display'] = array(
  '#markup' => '<div style="border:1px solid #333; padding: 5px;">' . $form_id . '</div>', 
  '#value' => '<div style="border:1px solid #333; padding: 5px;">' . $form_id . '</div>',
  '#weight' => -999,
  '#access' => user_access('administer nodes'),
);