Classical inheritance. Use Object.create to inherit object. Javascript >= 1.8.5

inheritance.js

var Parent = function ( settings ) {
    this.name = settings.name;
};

Parent.prototype.greet = function () {
    console.log ( 'Hello ' + this.name );
};

var Child = function ( settings ) {
    Parent.call ( this, settings );
};

Child.prototype = Object.create ( Parent.prototype );
Child.prototype.constructor = Child;