OOP in javascript

simple-oop.js

;(function($) {
  'use strict';

  var Nexus = function() {};

  Object._extend = function(child, parent) {

    var base = Nexus.prototype = parent.prototype;
    child.prototype = new Nexus();

    var cp = child.prototype;
    cp.constructor = child;
    cp._super = base;
    child._parent = parent;
  };

  Object._class = function (ctrFn, methods, baseClass) {
    if (baseClass) {
      Object._extend(ctrFn, baseClass);
    }
    $.extend(ctrFn.prototype, methods);
    return ctrFn;
  };

}(jQuery));