<script type="text/javascript" src="{{ server }}/recaptcha/api/challenge?k={{ public_key }}"></script>
<noscript>
    <iframe src="{{ server }}/recaptcha/api/noscript?k={{ public_key }}" 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>