new ExtroAccordion($$('#sidemenu dd'), $$('#sidemenu dt'),{
        show: -1,
        backToDefault: true,
        onActive: function(toggler, element) {
          toggler.setProperty('class', 'on');
        },
        onBackground: function(toggler, element) {
          toggler.setProperty('class', 'off');
        }
      });