google recaptcha

[admin]

Add this in the header

<script src='https://www.google.com/recaptcha/api.js'></script>


Add this the end of the file:

<script type="text/javascript">
   function my_button_click_handler() {

   var recaptcha = $("#g-recaptcha-response").val();
   if (recaptcha === "") {
      alert("Please check the recaptcha");
      return false;
   }
   return true;
};
</script>

Add the Recaptch at bottom of form before the </form>

                    <div  align="right" id="dmxReCaptcha2" class="g-recaptcha" data-sitekey="YOUR SITE KEY HERE"></div>

on form tag : add this 

<form onsubmit="return my_button_click_handler()" method="post"