Etwas

  if (arg(0) == "mysite" && arg(3) == "new") {
    if (isset($_POST['form_id'])) {
      $form_id = $_POST['form_id'];
      $question = str_replace("_node_form","", $form_id);
      $node = array("type" => $question);
      $form = drupal_retrieve_form($form_id, $node);
      drupal_prepare_form($form_id, $form);
      drupal_validate_form($form_id, $form);
      drupal_submit_form($form_id, $form);
      drupal_get_messages();
      drupal_goto(arg(0) . "/" . arg(1) . "/" . arg(2));
  }