code: public static void renderAutoScrollHiddenInput(FacesContext facesContext,
              ResponseWriter writer) throws IOException
      {
          writer.startElement(HTML.INPUT_ELEM, null);
          writer.writeAttribute(HTML.TYPE_ATTR, "hidden", null);
          writer.writeAttribute(HTML.NAME_ATTR, AUTO_SCROLL_PARAM, null);
          writer.endElement(HTML.INPUT_ELEM);
      }
docs: Renders the hidden form input that is necessary for the autoscroll feature.