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Captcha using CallBack function

I like to set all options to work gCaptcha. What should be fixed to work gCaptcha from this script? Need help.

[code=php]
<!DOCTYPE HTML>

<html>

<head>
<title>gCaptcha</title>
</head>

<body>
<form id=”mycontactform1″ method=”post”>

<script type=”text/javascript”>
var RecaptchaOptions = {“curl_timeout”:1,”lang”:”en”};
function captchaSubmit(data) {
document.getElementById(“mycontactform1”).submit();
}

function IsRecapchaValid()
{
var res = grecaptcha.getResponse(form);
if (res == “” || res == undefined || res.length == 0)
{
return false;
}
return true;
}
</script>

<script>
var form = “mycontactform1″;
var Callback = function () {

var reCaptchaFields = jQuery(‘.myid-recaptcha’);

reCaptchaFields.each(function (key)
{
var $this = jQuery(this);
var siteKey = $this.data(‘sitekey’);
$this.html(”);
grecaptcha.render(document.getElementById($this.attr(‘id’)),
{
‘sitekey’: siteKey
}
);
}
);
};

</script>
<script src=”https://www.google.com/recaptcha/api.js?hl=en&onload=Callback&render=explicit” async defer></script>
<div class=”g-recaptcha myid-recaptcha” data-sitekey=”” ></div>

<input type=”submit” name=”formsubmit1″ data-callback=”captchaSubmit” value=”Send” class=”” />

</form>
</body>

</html>
[/code]

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