PHP form submit - converting to jQuery .Ajax

[vestabs]

How easy is it to convert the following PHP form submission to an Ajaxy type form.Here is the PHP:\[code\]<?php //Send Tweet if(isset($_POST['submit'])) { $qtweet = $_REQUEST['tweet']; $connection->post('statuses/update', array('status' => $qtweet)); echo "<div style='padding-bottom: 5px; color: #0099FF;'>Updated your Timeline Successfully.</div>"; }?>\[/code\]And the HTML form:\[code\]<form id="tweethis" method='post' action='index.php'> <textarea style="width: 346px;" name="tweet" rows="5" id="tweet" ></textarea> <br /> <span id="charLeft">140</span> Characters left <br /> <input type='submit' value='http://stackoverflow.com/questions/3725810/Tweet This!' name='submit' id='submit' /> <br /></form>\[/code\]I'd like to use Ajax so the page doesnt need to reload.