我在头的末尾添加了以下内容
<script src='https://www.google.com/recaptcha/api.js'></script>
I have added this before end of form
<div class="g-recaptcha" data-sitekey="== xxxxxx =="></div>
I can see the recaptcha similar to https://developers.google.com/recaptcha/
HOwever, when user presses data without checking the checkbox, the data is submitted. Is there any other code I need to add to check if user has pressed the checkbox? Hopefully in js?