An implementation of the new Keyword in Javascript

newKeywordFunction.js

function NEW(constructor, argsArray) {
    var obj = {}; // step 1
    obj.__proto__ = constructor.prototype; // step 2
    constructor.apply(obj, argsArray); // step 3
    return obj; // step 4
}
function Parent(name) {
    this.name = name;
}
Parent.prototype.greet = function() {
    console.log("Hi, I'm " + this.name); 
}
var mom = NEW(Parent, ["Mom"]);
var dad = new Parent("Dad");