<input type="text" id="ordDate" size="10" name="itemWrappers[0].date" value=""/>
<script type="text/javascript">
        jQuery(function() {
         $("input[name='itemWrappers[0].date']").datepicker();
 });
</script>

<input type="text" id="ordDate" size="10" name="itemWrappers[1].date" value=""/>
<script type="text/javascript">
        jQuery(function() {
         $("input[name='itemWrappers[1].date']").datepicker();
 });
</script>

Everytime when i select the datepicker for name attribute "itemWrappers[1].date", 
it will always generate the selected date at "itemWrappers[0].date".