anchor.diff:                      <input id="content_blob_data" type="file"
                       <% if action==:edit -%>
                                disabled
  -                    <% end -%>
  -                    >
  +                    <% end -%> >
                   <% end %>
             </p>
   
  
positive.code: 
                    <%# fields_for upload_field,:local_copy do |local_copies| %>
  
                         <%#= local_copies.check_box upload_field, :local_copy, :id=>"local_copy" -%>
                    <%# end %>
                   <%= check_box upload_field, :local_copy, :id=>"local_copy" -%>
                  </p>
                  </p>
                  <p>
                    <span id="test_url_result_icon"></span>
                    <span id="test_url_msg" style="display:none;"></span>
                  </p>
              <% end -%>
  
          </div>
  
        </li>
      </ul>
  
negative.code:                                    :with=>"url_element.multi_selector.current_url_element.serialize()",
                                     :before=>"$('test_url_msg').innerHTML='';show_ajax_loader('test_url_result_icon');" )
                                     -%>
          var url = parseUri(multi_selector.current_url_element.value).file;
  
          if (url != "" && url != null) {
  