jquery UI dialog 和 asp.net 控件 出错 失效

代码

< 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 ,
                width:  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>