js.js
$('#cform').submit(function(e) {
        e.preventDefault();

        $.ajax({
            type: 'POST',
            url:'send.php',
            data: $('#cform').serialize()
        }).
        done(function(res) {
            $('#errors').bPopup();
            $('#errors p').html(res);
            $('#cform').val('');

        }).
        fail(function(err) {
            $('#errors').bPopup();
            $('#errors p').html(err.responseText);
            $(".b-close").bPopup().close();

        });
    });
});


send.php

<?php

if(isset($_POST['email'])) {

    $email_to = "dthomasn@gmail.com";
    $email_subject = "VERY";

    function died($error) {
        echo "<h1>I am truly sorry, but there appear to be a problem with the information you tried to submit. ";

        echo "These errors appear below.</h1><p><br /><br />";
        echo $error."<br /><br /></p>";
        die();
    }
    if(!isset($_POST['name']) ||
        !isset($_POST['email']) ||
        !isset($_POST['subject']) ||
        !isset($_POST['human']) ||
        !isset($_POST['comments'])) {
        died('I am truly sorry, but there appears to be a problem with the information you tried to submit.');
    }
    $name = $_POST['name']; // required
    $email_from = $_POST['email']; // required
    $subject = $_POST['subject']; // required
    $human = $_POST['human']; // not required
    $comments = $_POST['comments']; // required


    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
    if(!preg_match($email_exp,$email_from)) {
    $error_message .= 'The Email Address you entered was not an email.<br />';
  }
    $string_exp = "/^[A-Za-z .'-]+$/";
  if(!preg_match($string_exp,$name)) {
    $error_message .= 'The Name you entered is not a valid name.<br />';
  }
  if(strlen($subject) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
  }
  if($human != 10) {
    $error_message .= 'Human? Sry but 8ight+2wo is 10 no space for you here robo!<br />';
  }
  if(strlen($comments) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
  }
  if(strlen($error_message) > 0) {
    died($error_message);
  }
    $email_message = "Form details below.\n\n";


    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);

    }

    $email_message .= "Name: ".clean_string($name)."\n";
    $email_message .= "Email: ".clean_string($email_from)."\n";
    $email_message .= "Subject: ".clean_string($subject)."\n";
    $email_message .= "Comments: ".clean_string($comments)."\n";

// create email headers

$headers = 'From: '.$email_from."\r\n".

'Reply-To: '.$email_from."\r\n" .

'X-Mailer: PHP/' . phpversion();

@mail($email_to, $email_subject, $email_message, $headers);

?>
<p class="correct">Thank you for contacting me. We will be in touch very soon.</p>
<?php

}

?>