after submit form using ajax load url , jquery datepicker not work

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PHP

Ajax

jQuery

i have some problem here..when in page (addisy.php which is have jquery datepicker and its work well.) i submit my form using ajaxForm. after submitting,the page has loaded the main page which is name as isylist.php. then, if i click again the addisy.php, the jquery datepicker not working anymore..can codeproject member help me where in the code was error or conflict??

my code is here : addisy.php

<script src="js/jquery.js"></script>
        <script src="json/jquery.form.js"></script>
        <script>
         var j = $.noConflict();
         (function() {
         j('#isyform').ajaxForm({
           success: function(xhr) {
          },
         complete: function(xhr) {
             alert(xhr.responseText);
              $('#frame').load('isylist.php');
                 }
             }); 
             })();

</script>

<div id="frame">
       <form action="saveisy.php" method="post" id="isyform">
       <input type="text" id="datecollected" name="datecollected" class="datepicker" />
        <script>
       $(document).ready(function () {
        $("#datecollected").datepicker({
          changeMonth: true,
          changeYear: true,
          dateFormat: "d-m-yy"
        });
      });

      </script>
      <input type="submit" id="save" name="save" value="Save" />
       </form>
 </div>