anchor.diff:          <td><%= blabel :attachment, :uploaded_data, :en => "File" %></td>
           <td>
             <a href="#" class="add add_another_file_link"> <%= t 'links.add_another_file', "Add Another File" %> </a>
  -          <div class="submission_attachment" style="display: none;">
  +          <div id="submission_attachment_blank" class="submission_attachment" style="display: none;">
               <input type="file" name="attachments[-1][uploaded_data]"/>
               <a href="#" class="remove_attachment_link no-hover" style="display: none;"><%= image_tag "delete_circle.png" %></a>
               <% if @assignment.allowed_extensions.present? -%>
  
positive.code:       console.log("uploading files");
        $.ajaxJSONPreparedFiles.call(this, {
          handle_files: function(attachments, data) {
            var ids = (data['submission[attachment_ids]'] || "").split(",")
            for(var idx in attachments) {
              ids.push(attachments[idx].attachment.id);
            }
  
negative.code:     $(this).parent().find('.bad_ext_msg').showIf($.inArray(ext, allowed_extensions) < 0);
      checkAllowUploadSubmit();
    });
  });
  window.submissionAttachmentIndex = -1;
  </script>
  