jQuery/Ajax post data not being sent

Hello,

I'm using jQuery tabs and Ajax to send post data to an included page, but the data isn't being sent/received and I can't figure out why.

Here's my jQuery.

    $(function() { 
        var postData = {};

        $( ".tabs" ).tabs({  
            select: function(event, ui) {
                $('#r').html('<div style="padding: 5px;"><img src="<?php echo BASE_URL.'themes/'.$theme.'/images/ajax-loader.png'; ?>" /></div>');
                postData = {
                    uid: parseInt($(ui.tab).data('uid'))
                };
            },
            ajaxOptions: {
                type: 'POST',
                data: postData,
                error: function( xhr, status, index, anchor ) {
                    $( anchor.hash ).html(
                        "<div style='padding: 5px;'>Content could not be loaded, sorry about that.</div>" );
                }
            } 
        });
        $(".tabs ul li > a").attr('title', '');
    });

And here's the tabs.

    <div class="tabs">
        <ul>
            <li><a href="file1.php" data-uid="<?php echo $_GET['id']; ?>" title="r">File 1</a></li>
            <li><a href="file2.php" title="r" data-uid="<?php echo $_GET['id']; ?>">File 2</a></li>
            <li><a href="file3.php" title="r" data-uid="<?php echo $_GET['id']; ?>">File 3</a></li>
        </ul>
        <div id="r"></div>
    </div>

In file1.php I have a print_r($_POST);

But all that's shown is Array( ).

Does anyone have any ideas?

Tried checking what the contents of postData is, prior to sending the request?

Also, where is the actual AJAX call?

Sorry should have updated this really. I fixed it myself.

What was the problem, and how did you fix it?