need a confirmation text to appear on email submission

I have somehow put together a code which allows the users to send me a list of selected posts via e-mail and it is working fine.

Now, I would like a confirmation text eg. ‘THANK YOU’ appear to the user, once user has clicked the “send email” button. This could appear below the submit button and could have a class so that I could make it a bit pretty using css. I hope this can be achieved with appropriate changes in my codes. Please suggest a correction.

My javascript looks like this :

$(document).ready(function(){

  $('#sendEmail').click(function(){
     $.ajax({
         type: 'POST',
         url: 'www.example.com/email.php',
         data: { content: $('#email-data').html()}
     });
  });

});

and my HTML looks like this :

<div id="email-data">
    <div id="content">
        some php generated content
    </div>
</div>
<a id="sendEmail"> SEND EMAIL</a>

my email.php looks like this

<?php

  $to = "[email protected]";
  $subject = "FROM WEBSITE";
  $message = $_POST['content'];
  $headers = "From: company <[email protected]>" . "\r\n" .
             "Content-type: text/html" . "\r\n";
  mail($to, $subject, $message, $headers);
?>

Please let me know if I am not clear enough.