原型链

function Person(name,age){
this.name=name;
this.age=age;
}
Person.prototype={
constructor:Person,
show(){
console.log("我是show方法");
}

}
var p1=new Person("lili",18);
var p2=new Person("Tom",20);

原文：https://www.cnblogs.com/Blog-521/p/14003328.html