protected function _setupNavigation($sNode)
    {
        $sNode = 'newsletter_list';

        $myAdminNavig = $this->getNavigation();

        // active tab
        $iActTab = 3;

        // tabs
        $this->_aViewData['editnavi'] = $myAdminNavig->getTabs($sNode, $iActTab);

        // active tab
        $this->_aViewData['actlocation'] = $myAdminNavig->getActiveTab($sNode, $iActTab);

        // default tab
        $this->_aViewData['default_edit'] = $myAdminNavig->getActiveTab($sNode, $this->_iDefEdit);

        // passign active tab number
        $this->_aViewData['actedit'] = $iActTab;
    }