รบกวนช่วยดู code ให้หน้าอ่ะครับว่าทำไม คลิกแล้วถึงไม่แสดงปฎิทินให้อ่ะครับ

<script>
$(function() {    
	$( "#datepicker,#datepicker2" )
	.datepicker({dateFormat: 'dd/mm/yy', minDate: '99/99/9999', maxDate: '99/99/9999'})
	.change(function(){
		if($(this).attr('id')=='datepicker'){
			$('#datepicker2').datepicker({minDate: $(this).val()});
		}else{
			$('#datepicker').datepicker({maxDate: $(this).val()});
		}
	});
});
</script>

<? include '../t/user.php';
getheader(หน้าว่าง); ?>
<!-- Page Content -->
        <div id="page-wrapper">
            <div class="container-fluid">
                <div class="row">
                    <div class="col-lg-12">
                        <h1 class="page-header"></h1>
                    
                    <!-- /.col-lg-12 -->
  <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
  <link rel="stylesheet" href="/resources/demos/style.css">
  <script>
  $(function() {
    
    $( "#datepicker" ).datepicker({dateFormat: 'dd/mm/yy', maxDate: 0});
  });
  </script>
    <script>
  $(function() {
    
    $( "#datepicker2" ).datepicker({dateFormat: 'dd/mm/yy', minDate: 0});
  });
  </script>
      <input name="datepicker" type="text" id="datepicker" size="20" value="<?=date('d/m/Y')?>"></td>
        </tr>
         <tr>
        <td align="right" valign="top" >วันที่ต้องการส่ง :</td>
        <td>
          <input name="datepicker2" type="text" id="datepicker2" size="20" value="<?=date('d/m/Y')?>"></td>
        </tr>
        </div>
                </div>
                <!-- /.row -->
            </div>
            <!-- /.container-fluid -->
        </div>
        <!-- /#page-wrapper -->

    </div>
    <!-- /#wrapper -->
<? getfooter();?>