code: public void displayFrameSet() throws IOException {
  
          if (getJsp().getRequest().getParameter(CmsListExplorerFrameset.PARAM_PAGE) != null) {
              int page = Integer.parseInt(getJsp().getRequest().getParameter(CmsListExplorerFrameset.PARAM_PAGE));
              getSettings().setExplorerPage(page);
  
              if (getSettings().getCollector() instanceof I_CmsListResourceCollector) {
                  I_CmsListResourceCollector collector = (I_CmsListResourceCollector)getSettings().getCollector();
                  collector.setPage(page);
              }
          }
          JspWriter out = getJsp().getJspContext().getOut();
          out.print(defaultActionHtml());
      }
docs: Validates the needed parameters and display the frameset.<p>
  
  @throws IOException in case of errros displaying to the required page