code: protected void setButtonVisibility() {
  
          Component tab = m_tab.getSelectedTab();
          int pos = m_tab.getTabPosition(m_tab.getTab(tab));
          //TODO: check if necessary (when it was finally known which tabs web ou users should see..
          int maxPos = m_isWebOU ? 3 : 3; //has to be changed if number of tabs is changed for web OU user
          m_next.setVisible(pos < maxPos);
          m_ok.setVisible(pos == maxPos);
      }
docs: Sets the visibility of the buttons.<p>