Adding reCaptcha to this jQuery AJAX form - php

Question

I am having some problems adding a reCaptcha to my jQuery AJAX form.
I have tried following the documentation, in particular this page, but had no luck.
If I use the "Challenge and Non-JavaScript API", adding the code
before the send button, I get no output.
If I try with the method
called "AJAX API" adding a custom div inside the form, I don't get
anything anyway. Basically I am not able to show and then validate
it.
This is the code that I have so far.
My form:
<div id="contactForm"><img src="img/contact-form.png" width="250" height="365" alt="contact" /></div>
Name: <span class="contactErrorFloat" id="err-name">Need the name</span>
<input name="name" id="name" type="text" placeholder="Name.." />
Email: <span class="contactErrorFloat" id="err-email">Need email</span><span class="contactErrorFloat" id="err-emailvld">Email not valid.</span>
<input name="email" id="email" type="text" placeholder="Email.." />
Message:
<textarea name="message" id="message" rows="10" placeholder="Message.."></textarea>
<button id="send">Send</button>
<div class="contactError" id="err-form">Error during validation</div>
<div class="contactError" id="err-timedout">Timeout</div>
<div class="contactError" id="err-state"></div>
<div id="ajaxsuccess">Email sent!</div>
</form>
My Script:
jQuery(document).ready(function ($) {
$('#send').click(function(){
$('.error').fadeOut('slow'); // Resetta i messaggi di errore, nascondendoli
var error = false;
var name = $('input#name').val();
if (name == "" || name == " ") {
$('#err-name').fadeIn('slow');
error = true;
}
var email_compare = /^([a-z0-9_.-]+)#([da-z.-]+).([a-z.]{2,6})$/;
var email = $('input#email').val();
if (email == "" || email == " ") {
$('#err-email').fadeIn('slow');
error = true;
} else if (!email_compare.test(email)) {
$('#err-emailvld').fadeIn('slow');
error = true;
}
if (error == true) {
$('#err-form').slideDown('slow');
return false;
}
var data_string = $('#ajax-form').serialize();
$.ajax({
type: "POST",
url: $('#ajax-form').attr('action'),
data: data_string,
timeout: 6000,
error: function(request, error) {
if (error == "timeout") {
$('#err-timedout').slideDown('slow');
} else {
$('#err-state').slideDown('slow');
$('#err-state').html('C\'è stato un errore: ' + error + '');
}
},
success: function () {
$('ajax-form').slideUp('slow');
$('#ajaxsuccess').slideDown('slow');
}
});
return false;
});
});
There is also a PHP file with the php function to send the email but I don't think it's much important actually. I would really LOVE if someone could give me any help to implement this. Thanks a lot!

Answer 1

first of all you have to sign in to recaptcha. You can do this here:
recaptcha.net
then you can get your key. Then you embed the key into the sample code.
Here
<script type="text/javascript"
src="http://www.google.com/recaptcha/api/challenge?k=**your_public_key**">
and here
<iframe src="http://www.google.com/recaptcha/api/noscript?k=**your_public_key**"
height="300" width="500" frameborder="0"></iframe>