javascript inheritance

JavaScript inheritance.js

function Person(name){
    this.name = name;
}

Person.prototype.sayName = function(){
    console.log(this.name);
}

function extend(subClass, superClass){
    function F(){}
    F.prototype = superClass.prototype;
    subClass.prototype = new F();
    subClass.prototype.constructor = subClass;
}

function Student(name){
    this.name = name
}

extend(Student, Person);

Student.prototype.setName = function(name){
    this.name = name;
}

var stu = new Student('Tom');

stu.sayName();