why is not working datepicker code

Question

<?php include('include_navigation.html');?>

.all code is right and work but when
i have use this code in my page then date-picker is not working . why it's happen plz tell me Where the
datepicker should appear? and also
when i have remove this code date-picker code is working and i have not getting what happen so plz tell me what is wrong in here.....

date-picker code here......

<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.2/themes/smoothness
/jquery-ui.css" />
   <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
   <script src="http://code.jquery.com/ui/1.10.2/jquery-ui.js"></script>

   <link rel="stylesheet" href="/resources/demos/style.css" />

  <style>
    .datepicker{

     }
   </style>

    <script>
    $(function() {
    $( ".datepicker" ).datepicker({ dateFormat: 'yy-mm-dd' });
    });
       </script>



 html code

     <tr>
    <td>Admission Date</td>
    <td height="48">:</td>
    <td height="48"><label><input type="text" name="AD_DT" id="AD_DT"   
          class="datepicker" style="width:80px;" /></label></td>
      </tr>

`

Answer 1

Try this code

$(document).ready( function() {
$( ".datepicker" ).datepicker({ dateFormat: 'yy-mm-dd' });
});