关于向drupal中添加js的问题

//请问大家有熟悉drupal的吗？我想在user.module中的user_authenticate函数中插入一段script,请问如何做？

function user_authenticate($name, $pass) {

  global $user;

  // Try to log in the user locally. Don't set $user unless successful.

  if ($account = user_load(array('name' => $name, 'pass' => $pass, 'status' => 1))) {

    // Check if the e-mail is denied by an access rule.

    // Doing this check here saves us a user_load() in user_login_validate()

    // and introduces less code change for a security fix.

    if (drupal_is_denied('mail', $account->mail)) {

      form_set_error('name', t('The name %name is registered using a reserved e-mail address and therefore could not be logged in.', array('%name' => $account->name)));

      return;

    }

    else {

//我想在登陆成功后在这里插入一段script，请问如何插入，试了一个晚上，用drupal_add_js总是不行



      $user = $account;

 

      return $user;

    }

  }