function Show(){
this.name="run";
}

function Run(){
this.age="20"; //Run继承了Show,通过原型，形成链条
}
Run.prototype=new Show();
var show=new Run();
alert(show.name)//结果：run

function Box(age){
this.name=[‘Lee‘,‘Jack‘,‘Hello‘]
this.age=age;
}
function Desk(age){
Box.call(this,age); //对象冒充，给超类型传参
}
var desk = new Desk(200);
alert(desk.age);//200
alert(desk.name);//[‘Lee‘,‘Jack‘,‘Hello‘]
desk.name.push(‘AAA‘); //添加的新数据，只给 desk
alert(desk.name)//[‘Lee‘,‘Jack‘,‘Hello‘,‘AAA‘]

function Box(age) {
this.name = [‘Lee‘, ‘Jack‘, ‘Hello‘]
this.age = age;
}
Box.prototype.run = function () {
return this.name + this.age;
};
function Desk(age) {
Box.call(this, age); //对象冒充
}
Desk.prototype = new Box(); //原型链继承
var desk = new Desk(100);
alert(desk.run());

function obj(o) { //传递一个字面量函数
function F() {} //创建一个构造函数
F.prototype = o; //把字面量函数赋值给构造函数的原型
return new F(); //最终返回出实例化的构造函数
}
var box = { //字面量对象
name : ‘Lee‘,
arr : [‘哥哥‘,‘妹妹‘,‘姐姐‘]
};
var box1 = obj(box); //传递
alert(box1.name);
box1.name = ‘Jack‘;
alert(box1.name);
alert(box1.arr);
box1.arr.push(‘父母‘);
alert(box1.arr);
var box2 = obj(box); //传递
alert(box2.name);
alert(box2.arr); //引用类型共享了

function object(o) {
    function F() {}
    F.prototype = o;
    return new F();
}

function inheritPrototype(subType, superType) {
    var prototype = object(superType.prototype);  //创建对象
    prototype.constructor = subType;              //增强对象
    subType.prototype = prototype;                //指定对象
}