private function recaptcha_get_html($pubkey, $error = null, $use_ssl = false)
{
$server = $use_ssl ? self::RECAPTCHA_API_SECURE_SERVER : ($server = self::RECAPTCHA_API_SERVER);
$errorpart = '';
if ($error) {
$errorpart = "&error=" . $error;
}
return '<script type="text/javascript" src="' . $server . '/challenge?k=' . $pubkey . $errorpart . '"></script>
<noscript>
<iframe src="' . $server . '/noscript?k=' . $pubkey . $errorpart . '" height="300" width="500" frameborder="0"></iframe><br/>
<textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>
<input type="hidden" name="recaptcha_response_field" value="manual_challenge"/>
</noscript>';
}