reCAPTCHA

<script src=”https://www.google.com/recaptcha/api.js”></script>
<script>
function onSubmit(token) {
document.getElementById(„demo-form”).submit();
}
</script>
<button class=”g-recaptcha”
data-sitekey=”reCAPTCHA_site_key”
data-callback=’onSubmit’
data-action=’submit’>Submit</button>