Javascript Inheritance

A.js

Core = function(){};

Core.prototype.logger = function(arg){
    console.log(+Date(), arg);
};

B1.js

var base = new Core();

base.logger("Samuel!"); // 3909024909 Samuel!

base.prototype.isSamuel = true;

base.prototype.logger = function(arg){
    console.log("I'm awesome!");
    this.base()
};

B2.js

var base = new Core();

base.logger("Peter!"); // 3909024909 Peter!

base.prototype.isSamuel = true;

base.prototype.logger = function(arg){
    console.log("I'm awesome!");
    this.base()
};