code: function(fn) {
        return function(key, value) {
          if (typeOf(key) == "object") {
            for (var i in key) {
              fn.call(this, i, key[i]);
            }
          } else {
            fn.call(this, key, value);
          }
          return this;
        };
      }
docs: 存放local属性...被global坑死了 常用属性local化