Datepicker changing the date

Datepicker changing the date

Hi 
I am trying to use datepicker in my site to store appointments. It work superb on the creation of a new record but when i am trying to edit the date of a previously created record it keeps the old one on the database. I am using dreamweaver for the creation of the site. This is the code

 <label>          </label>
          <label>Τελευταία Επίσκεψη
            <input type="text" size="30" value="<?php echo $row_Customer['lastdate']; ?>" id="jQueryUICalendar2" name="jQueryUICalendar2"/>
          </label>
       </p>
        <script type="text/javascript">
// BeginWebWidget jQuery_UI_Calendar: jQueryUICalendar2
jQuery("#jQueryUICalendar2").datepicker({ yearRange: '2008:2020',dateFormat: 'yy-mm-dd'});

// EndWebWidget jQuery_UI_Calendar: jQueryUICalendar2
        </script>