Question

I want to access variables by using

MyNamespace.variable1

that are globally accessible. I believe Drupal does something similar, no?

Answer 1

What Drupal does is using the following code:

var Drupal = Drupal || { 'settings': {}, 'behaviors': {}, 'locale': {} };

Drupal.attachBehaviors = function (context, settings) {
  context = context || document;
  settings = settings || Drupal.settings;
  // Execute all of them.
  $.each(Drupal.behaviors, function () {
    if ($.isFunction(this.attach)) {
      this.attach(context, settings);
    }
  });
};

Drupal.detachBehaviors = function (context, settings, trigger) {
  context = context || document;
  settings = settings || Drupal.settings;
  trigger = trigger || 'unload';
  // Execute all of them.
  $.each(Drupal.behaviors, function () {
    if ($.isFunction(this.detach)) {
      this.detach(context, settings, trigger);
    }
  });
};

// …

Using similar code, you can emulate namespaces using JavaScript.