Namespaces in JavaScript

Hi,
Here with I am giving simple example of how to create JavaScript namespaces and how it got used.May be you might find code in most of the JavaScript file which is written as for ex. System.mynamspace.class.
Hope this will help users to understand little bit about namespacing in JavaScript and how to read it in other scripts.

var itvidya = {blog:{}}; //Defining new namespace
itvidya.blog.user = function() {alert('New User');};//Defining class in namespace
itvidya.blog.user(); //Class Initialization

var blg = {};
blg.NewUser = itvidya.blog.user; //Importing namespace symbol
blg.NewUser = function(){alert('New user created')};//Making change in New Namespace
blg.NewUser();

Hope this helps.

Thanks
Amit