How to install nodejs in Windows 7?

I want to use javascript on my ongoing moodle development work. But the latest version of moodle 2.8 supporting to YUI library. Now there is no use of YUI because yahoo ceased that api due to transitioning (http://yahooeng.tumblr.com/post/96098168666/important-announcement-regarding-yui)

The soultion is that moodlers suggesting to install nodejs to use javascripts modules. So I mentioned steps which i installed on my windows 7 machine.

1. Download the latest nodejs executable file from https://nodejs.org/#download

2. Once the installation done the files will be placed under the C://Program Files/nodesjs directory

3. Click on command prompt and test the nodejs verion to check the nodejs installed correctly.

4.  While doing nodejs installation it will also install npm.

5. To check the nodejs by script 

  Just write hello.js with the content console.log('Welcome to NodeJs!'); 

 Then from command prompt right the below command to execute it

 

6. Create a test file server.js and put this code in that file:

var http = require('http');

http.createServer(function (req, res) {

    res.writeHead(200, {'Content-Type': 'text/plain'});

    res.end('Hello World\n');

}).listen(1337, "127.0.0.1");

console.log('Server running at http://127.0.0.1:1337/');

7. Open this address in your browser: http://127.0.0.1:1337/