MySQL Date Fields and PHP and jQueryUI
Here's how to quickly make jQuery UI work with MySQL date fields. Insert these scripts in the head of the document:

<script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="js/jquery-ui-1.8.4.custom.min.js"></script>
<script type="text/javascript">

// Datepicker
inline: true
//hover states on the static widgets
$('#dialog_link, ul#icons li').hover(
function() { $(this).addClass('ui-state-hover'); }, 
function() { $(this).removeClass('ui-state-hover'); }

Make sure to set your input like this:

<td><input type="text" name="ck_date" value="" size="32" id="datepicker"></td>

Then, to get MySQL to work with a date field, change this:

inline: true
To this:

$('#datepicker').datepicker({ dateFormat: 'yy-mm-dd'