/**

* Author: Ruben Oliveira from Teameffort.pt

*/

function Person() { // base class

    this.sayHello = function (){

        alert ('Hello!'); 

    }

    this.sayBy = function (){

        alert ('Good By!'); 

    }

​

    this.ocupation = function(){} // this method doesn't need to be declared. but for illustration let's keep it here.

}

​

​

function Student(){ // class that will extend Person class

    this.ocupation = function (){ // override ocupation method

        alert ("I'm a student!");

    }

    this.workExperience = function (){

        alert("I have no work experience cause... I'm a student!");

    }

}

Student.prototype = new Person(); // inherit from Person

​

function Worker(){ // another impl of Person...

    this.ocupation = function (){

        alert ("I'm a worker!");

    }

    this.workExperience = function (){

        alert("I have 20 years of work experience!");

    }

}

Worker.prototype = new Person();

​

​

var student = new Student();

student.sayHello();

student.ocupation();

student.workExperience();

student.sayBy();

​

var worker = new Worker();

worker.sayHello();

worker.ocupation();

worker.workExperience();

worker.sayBy();

​

​