Clone object in JavaScript - prototypal inheritance

object-create.js

/**
 * @see http://javascript.crockford.com/prototypal.html
 */
if (typeof Object.create !== 'function') {
    Object.create = function(o) {
        var F = function() {};
        F.prototype = o;
        return new F();
    };
}

newObj = Object.create(oldObj);