Questo modulo mi funziona ma solo se vado alla pagina
rep_locator/ajax_example_simplest.

Come faccio a farlo funzionare anche nella rep_locator ?

<?php
/**
* @file
* Install, update and uninstall functions for the rep_locator.
*/
// $Id$

/**
* Implements hook_help().
*/
function rep_locator_help($section='') {
  $output = '';
  switch ($section) {
    case "admin/help#rep_locator":
        $output .= t('help_admin');
      break;
  }
  return $output;
} // function rep_locator_help

/**
* Implements hook_permission().
*/
function rep_locator_permission() {
  return array(
  'access rep_locator content' => array(
  'title' => t('content Title'),
  'description' => t('content Description')
  )
  );
} // function rep_locator_permission()

/**
* Implements hook_menu().
*/
function rep_locator_menu() {
  $items['rep_locator'] = array(
    'title' => 'List Your Business',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rep_locator_page'),
    'access callback' => TRUE,
    );
   
  $items['rep_locator/ajax_example_simplest'] = array(
    'title' => 'ajax_example_simplest',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('ajax_example_autotextfields'),
    'access callback' => TRUE,
    'weight' => 0,
    );
      
  return $items;
} // function rep_locator_menu()

/**
* Implements hook_page().
*/
function rep_locator_page() {
  return drupal_get_form('ajax_example_autotextfields');
}


/**
* @ingroup ajax_examples
* @{
*/

/**
* Show/hide textfields based on AJAX-enabled checkbox clicks.
*/
function ajax_example_autotextfields($form, &$form_state) {

  $form['rep_sector'] = array(
    '#type' => 'select',
    '#id' => 'rep_sector',
    '#name' => 'rep_sector',
    '#size' => 1,
    '#options' => array('1' => '1', '2' => '2', '3' => '3'),
    '#ajax' => array(
      'callback' => 'ajax_example_autotextfields_callback',
      'wrapper' => 'second_select',
      'effect' => 'fade',
    )
  );


  $form['second_select'] = array(
    '#prefix' => '<div id="second_select">',
    '#suffix' => '</div>',
    '#type' => 'fieldset',
  );

  // Since checkboxes return TRUE or FALSE, we have to check that
  // $form_state has been filled as well as what it contains.
  if (!empty($form_state['values']['rep_sector']) && $form_state['values']['rep_sector']!='2') {
    $form['second_select']['rep_state'] = array(
      '#type' => 'select',
      '#id' => 'rep_state',
      '#name' => 'rep_state',
      '#size' => 1,
      '#options' => array('1' => '1', '2' => '2', '3' => '3'),
    );
  }


  return $form;
}

/**
* Selects the piece of the form we want to use as replacement text and returns
* it as a form (renderable array).
*
* @return renderable array (the textfields element)
*/
function ajax_example_autotextfields_callback($form, $form_state) {
  return $form['second_select'];
}