/**
  * Display form to add a new user
  *
  * @access	private
  */
 private function display_form()
 {
     Html::nu_form('o', $this->_new_user->_username, $this->_new_user->_email, $this->_new_user->_firstname, $this->_new_user->_lastname, $this->_new_user->_website);
     foreach ($this->_roles as $role) {
         Html::option($role, ucfirst($role));
     }
     Html::nu_form('c');
 }