code: function() {
          $('body').css({
              overflow: 'hidden'
          });
  
          var index = this.options.zIndex || ++currentIndex;
  
          this.$mask.css({
              zIndex: index - 1
          }).show();
  
          var self = this;
          this.$container.css({
                  zIndex: index
              })
              .show()
              .animate({
                  left: 0
              }, this.options.speed, function() {
                  self.$container.find('.biz-panel-body')[0].scrollTop = 0;
              });
      }
docs: 打开