express3 - trying to route files

I am trying to route files in express3 but I get a problem.
So here is the code for routing the files -

var app = require('express')(),
server = require('http').createServer(app),
io = require('socket.io').listen(server);

server.listen(8080);

// routing
app.get('/', function (req, res) {
    res.sendfile("index/index.html");
    app.use(app.static(__dirname + 'index'));
});

When I open localhost:8080 in Chrome it gives me an error :

TypeError: Object function app(req, res){ app.handle(req, res); } has no method 'static'

What I did wrong?

All of my HTML/CSS/JS files are in the index directory.

static is static function from express, you cannot access it from instance object crated by express. you need to assign required express to different variable.

var express = require('express'),
    app = = express(),
    server = require('http').createServer(app),
    io = require('socket.io').listen(server);

server.listen(8080);

// routing
app.get('/', function (req, res) {
    res.sendfile("index/index.html");
    app.use(express.static(__dirname + 'index'));
});