Using express.js
The FILE IS APP.Js
var express = require('express')
var service = require('./routes/service');

var app = module.exports = express.createServer();

// Configuration

app.configure(function(){
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser());
  app.use(express.session({ secret: 'your secret here' }));
  app.use(require('stylus').middleware({ src: __dirname + '/public' }));
  app.use(app.router);
  app.use(express.static(__dirname + '/public'));
});

app.configure('development', function(){
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

app.configure('production', function(){
  app.use(express.errorHandler());
});

// Routes

app.get('/', service.home);
app.post('/',service.home_post_handler);
app.get('/items', service.items);

app.listen(3000, function(){
  console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);
});
-------------------------------------
The Service.js placed in route folder
exports.home= function(req,res){
    if(typeof req.message== 'Undefined')
        res.render('home', {title:'My Service'});
    else
        res.redirect('/items');
};

exports.home_post_handler = function(req,res){
    message = req.body.message || 'Message Command is Empty';
    req.message = message;
    res.redirect('/');
}
// Just using cox in tutorial there they use it as database
/*var items = {
    WEL:{name:'Welcome Dear'}
}*/

exports.items = function(req,res){
    if(typeof req.message == 'undefined')
        res.redirect('/');
    else
        res.render('items',{title:'My Service - Message', message:req.body.message, items:items});
};