title: How to have a navigation full ajax?
body: <p>I have a question.</p>
  
  <p>I visited a site : <a href="http://currenthiphop.com/" rel="nofollow">http://currenthiphop.com/</a>. And when I clicked on a link, the link on adress bar change to <code>http://currenthiphop.com/#!/</code> + link. (like Twitter, Faceboook...)</p>
  
  <p>However, in the attribut <code>href</code>, there is no <code>#!</code>. Why ? </p>
  
  <p>Is is a ajax navigation isn't ? 
  How can I do something like this ? </p>
  
  <p>Thanks </p>