Node.js: Extracting the image urls of a webpage

I'm trying to get the images of a given webpage. I've tried using the modules request and jsdom as follows:

var request = require('request'),
    jsdom = require('jsdom');

request({ uri:'http://www.google.com' }, function (error, response, body) {
  if (error && response.statusCode !== 200) {
    console.log('Error when contacting google.com')
  }

  jsdom.env({
    html: body,
    scripts: [
      'http://code.jquery.com/jquery-1.8.2.min.js'
    ]
  }, function (err, window) {
    var $ = window.jQuery;

    $(function () {
      console.log($('img').length);
    })
  });
});

Unfortunately, console.log($('img').length); prints 0 despite the page google.com containing images...

What am I doing wrong?