请教高手。

  为什么就是改变不了当前的图片啊 。请高手解答（我想修改的是imageFrom控件） <script type="text/javascript">       $.editable.addInputType('ajaxupload', {
           /* create input element */
           element: function (settings) {
               settings.onblur = 'ignore';
               var input = $('<input type="file" id="upload" name="upload" />');
               $(this).append(input);
               return (input);
           },
           content: function (string, settings, original) {
               /* do nothing */
           },
           plugin: function (settings, original) {
               var form = this;
               form.attr("enctype", "multipart/form-data");
               $("button:submit", form).bind('click', function () {                   //$(".message").show();
                   $.ajaxFileUpload({
                       url: "subtitledit.ashx?subtitleid=" + subtitleid + "&&action=upload",
                       secureuri: false,
                       fileElementId: 'upload',
                       dataType: 'text/html',
                       success: function (data, status) {
                           if (status == "success") {
                               var person = $.parseJSON(data);
                               $(original).html(person.msg);
                               original.editing = false;                             $("#imageFrom").src = "http://www.bcbbs.net/logo/2011bs.gif";
                                                     }
                           else {
                               alert(data.msg + "Error");
                           }
                       },
                       error: function (data, status, e)
                       { alert(e); }
                   }); return (false);
               });
           }
       });
       
             
</script>