gistfile1.js

Gdn_MultiFileUpload.prototype.NewUploader = function() {
      var NewUploaderID = null; var AutoShow = false;
      if (this.CurrentInput == null) {
         NewUploaderID = 1;
      } else {
         AutoShow = true;
         NewUploaderID = parseInt(this.CurrentInput.split('_').pop()) + 1;
      }
      
      NewUploaderID = [this.AttachFileRootName,NewUploaderID].join('_');
      
      var UploaderForm;
      var Action = ['post','upload',NewUploaderID];
      if (this.ActionRoot)
         Action.unshift(this.ActionRoot);
      Action.unshift('');

      var IFrameName = this.NewFrame(NewUploaderID);
      var FormName = IFrameName+'_form';
      
      if (jQuery.browser.msie) {
        UploaderForm = document.createElement('<form action="' + Action.join('/') + '" method="POST" enctype="multipart/form-data" class="FileUpload" id="' + FormName + '" target="' + IFrameName + '" />');
      } else {
        UploaderForm = $('<form />').attr({
          enctype:'multipart/form-data',
          method:'POST',
          id:FormName,
          target:IFrameName,
          action:Action.join('/')
        }).addClass('FileUpload')[0];
      }
      
      if (this.APC) {
         var APCNotifier = document.createElement('input');
         APCNotifier.type = 'hidden';
         APCNotifier.name = 'APC_UPLOAD_PROGRESS';
         APCNotifier.id = NewUploaderID+'_apckey';
         APCNotifier.value = this.UniqID + '_' + NewUploaderID;
         $(UploaderForm).append(APCNotifier);
      }
            
      var NewUploader   = document.createElement('input');
      NewUploader.type  = 'file';
      NewUploader.name  = NewUploaderID;
      NewUploader.id    = NewUploaderID;
      NewUploader.className = '';
      NewUploader.rel = FormName;
      $(UploaderForm).append(NewUploader);
      
      var MaxUploadSize = document.createElement('input');
      MaxUploadSize.type = 'hidden';
      MaxUploadSize.name = 'MAX_UPLOAD_SIZE';
      MaxUploadSize.value = this.MaxUploadSize;
      $(UploaderForm).append(MaxUploadSize);
      
      $(this.CurrentUploader).append(UploaderForm);
      this.CurrentInput = NewUploaderID;
      this.ProgressBars[NewUploaderID] = {
         'Target':   IFrameName,
         'Filename': '',
         'TimerID':  0,
         'ApcKey':   this.UniqID + '_' + NewUploaderID,
         'Progress': 0,
         'Size':     0,
         'Complete': false
      };
      
      if (AutoShow)
         this.ShowUploader(true);
      $('#'+this.CurrentInput).change(jQuery.proxy(this.DispatchCurrentUploader,this));
   }

no, this is do not. perhelps it is have right results, but it cann't upload image......
IE6 echo:
{"MediaResponse":{"Status":"success","MediaID":"49","Filename":"\u6d4b\u8bd5\u56fe\u7247.jpg","Filesize":7810,"FormatFilesize":"7.6K","ProgressKey":"1303297218703_UploadAttachment_1","PreviewImageLocation":"/uploads/FileUpload/scratch/fresh-25a43d73f8e3c3cd9ca0cf37874624ca-1303297230.3407.jpg","FinalImageLocation":"/uploads/FileUpload/9/49.jpg"},"FormSaved":true,"DeliveryType":"VIEW","Data":"","StatusMessage":"","RedirectUrl":""}