unset($variables['form']['actions']['submit']);
  unset($variables['form']['actions']['#children']);

  $variables['form']['search_block_form']['#value'] = $prompt;
  $variables['form']['search_block_form']['#size'] = theme_get_setting('searchbox_size');
  $variables['form']['search_block_form']['#attributes'] = array(
    'onblur'  => "if (this.value == '') { this.value = '$prompt'; }",
    'onfocus' => "if (this.value == '$prompt') { this.value = ''; }" );

  // we should use 'render' instead of 'drupal_render' since the form is already rendered once.
  foreach (element_children($variables['form']) as $key) {
    $type = $variables['form'][$key]['#type'];
    if ($type == 'hidden' || $type == 'token') {
      $hidden[] = render($variables['form'][$key]);
    }
    else {
      $variables['search'][$key] = render($variables['form'][$key]);
    }
  }
  $variables['search']['hidden'] = implode($hidden);
  $variables['search_form'] = implode($variables['search']);
}