public function checkAgainstDefaultValue($searchString)
    {
        $searchStringToLower = strtolower(trim($searchString));
        $defaultValueToLower = strtolower($this->pObj->pi_getLL('searchbox_default_value'));
        if ($searchStringToLower === $defaultValueToLower) {
            $searchString = '';
        }

        return $searchString;
    }