JavaScript API
<html>
<head>
<title>reCAPTCHA demo: Simple page</title>
<script src="https://www.google.com/recaptcha/enterprise.js" async defer></script>
</head>
<body>
<form action="" method="POST">
<div class="g-recaptcha" data-sitekey="6LfX6V8rAAAAAHLetn_B9b3gWthMPh_DaG4fAZ1g" data-action="LOGIN"></div>
<br/>
<input type="submit" value="Submit">
</form>
</body>
</html>
