//原型对象中的方法,可以相互调用
    function Animal(name,age) {
    this.name=name;
    this.age=age;
    }
    //原型中添加方法
    Animal.prototype.eat=function () {
    console.log(“动物吃东西”);
    this.play();
    };
    Animal.prototype.play=function () {
    console.log(“玩球”);
    this.sleep();
    };
    Animal.prototype.sleep=function () {
    console.log(“睡觉了”);
    };
    var dog = new Animal(“小苏”,20);
    dog.eat();
    image.png