Jquery UI Dialog 和 .net控件冲突的解决

<script type="text/jscript" src="http://www.cnblogs.com/js/jquery-1.4.2.min.js"></script>
    <script type="text/jscript" src="http://www.cnblogs.com/js/jqueryUI/js/jquery-ui-1.8.4.custom.min.js"></script>
    <script type="text/jscript">
      $(document).ready(
          function() 
          {
             $("#showCourseDiv").dialog
             ({autoOpen: false,
                height: 200,
                 400,
                modal: true,    
              });

          }
      );

        function ShowDiv(gid)
        {
                $("#hfGroupId").val(gid);
               //dilog默认会把弹出框层,追加到body上面.但asp.net需要控件都在form中.
                $("#showCourseDiv").parent().appendTo($("form:first")); 
                $("#showCourseDiv").dialog('open');

         
        }
    </script>