CDN Host CSS Issue (First example)

CDN Host CSS Issue (First example)

The first code example in the book shows the below (I tried with CDN Host CSS as well by downloading) . I do not see the css id : home in the css linked. I can see a plain html instead of css display. I'm not sure what is happening. Do I have to install any software for JQueryMobile to work? I dont think so, this is my first app with mobile, and I'm in learning process. I need a help. Thanks. What should I do to make it work?

<!DOCTYPE html>
<html>
<head>
<title>jQuery Mobile Page Structure Test</title>
 <link rel="stylesheet" href="http://code.jquery.com/mobile/1.0a2/
 jquery.mobile-1.0a2.min.css" />
 <script src="http://code.jquery.com/jquery-1.4.4.min.js"></script>
 <script src="http://code.jquery.com/mobile/1.0a2/jquery.mobile-1.0a2.
 min.js"></script>
</head>
<body>
 <div data-role="ui-page" id="home">
  <div data-role="header">
   <h1>Home page</h1>
   </div>
   <div data-role="content">
   <p>Hello Mobile World!</p>
   </div>
   <div data-role="footer">
   <h4>I'm the footer</h4>
  </div>
 </div>
</body>
</html>






















 
 I do not see the reference to a2.css (I changed all the src location