Added client callback properties for v2

[MagnusJohansson]

This extends the control with the data-callback and data-expired-callback properties. So one can enable/disable a submit button:

 @Html.Recaptcha(dataCallback: "capenable", dataExpiredCallback: "capdisable")
...
 <input type="submit" class="btn btn-default" value="Register" />
   ...
<script type="text/javascript">
        function capenable() {
            $('input[type="submit"]').prop('disabled', false);
        }
        function capdisable() {
            $('input[type="submit"]').prop('disabled', true);
        }
        $(document).ready(function () {
            capdisable();
        });
    </script>

[arc95]

Is the callback feature available now?

[vidyesh-phases]

Looks like this feature is not available in the version 2.1.0