code: function Attribute(config) {
          var self = this, c = self.constructor;    // save user config
          // save user config
          self.userConfig = config;    // define
          // define
          while (c) {
              addAttrs(self, c.ATTRS);
              c = c.superclass ? c.superclass.constructor : null;
          }    // initial attr
          // initial attr
          initAttrs(self, config);
      }
docs: attribute management
  @class KISSY.Attribute
   
  attribute management
  @class KISSY.Attribute