inheritance javascript

inheritance.js

// create an object a  and clone it in b
var a = {
    init:function(){return 'hello'}
}, b = Object.create(a);

// check the values
a.init(); // hello
b.init(); // hello 

// set a new return value to init
b.init = function(){return 'world'};

// check the values
a.init(); // hello
b.init(); // world