摘要： Creative Lifesaver Honest Entertainer Brave Astronaut ... 阅读全文

摘要： 定义构造器并扩充它的原型var Mammal = function(name){ this.name = name; }; Mammal.prototype.getName = function(){ return this.name; }; Mammal.prototype.says = function(){ return this.saying||""; };var Cat = function(name){ this.name = name; this.saying = "cat"; }; Cat.prototype = new Mammal() 阅读全文