public function isAjax()
    {
        if (
            strlen($this->arParams['AJAX_COMPONENT_ID']) > 0
            && strlen($this->arParams['AJAX_PARAM_NAME']) > 0
            && $_REQUEST[$this->arParams['AJAX_PARAM_NAME']] === $this->arParams['AJAX_COMPONENT_ID']
            && isset($_SERVER['HTTP_X_REQUESTED_WITH'])
            && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest'
        )
        {
            return true;
        }

        return false;
    }