docs: function navTouchEvt(e) {
              var $cur = $(e.currentTarget),
                  type;
  
              if ($cur.hasClass('screen-nav')) {
                  //筛选
                  $screen.toggleClass('hide');
                  $prevFocusNav.toggleClass('focus');
                  $cur.toggleClass('focus');
              } else {
                  if ($cur.hasClass('focus')) {
                      if ($cur.hasClass('price-nav')) {
                          toggleSort($cur);
                      }
                      return;
                  }
  
                  $prevFocusNav = $cur;
  
                  $navItem.removeClass('focus');
                  $cur.addClass('focus');
  
                  type = getFocusNavType(); //当前focus项(new/sale/price)
  
                  $goodList.addClass('hide');
                  switch (type) {
                      case 'newest':
                          $npc.removeClass('hide');
                          break;
                      case 'sale':
                          $svc.removeClass('hide');
                          break;
                      case 'price':
                          $pc.removeClass('hide');
                          break;
                  }
  
                  if (navInfo[type].reload) {
                      search();
                  }
              }
          }