Prototypal Inheritance in JavaScript

출처 : http://javascript.crockford.com/prototypal.html

Object.prototype.begetObject = function () {
    function F() {}
    F.prototype = this;
    return new F();
};

newObject = oldObject.begetObject();

if (typeof Object.create !== 'function') {
    Object.create = function (o) {
        function F() {}
        F.prototype = o;
        return new F();
    };
}
newObject = Object.create(oldObject);