title: jQuery / Tumblr - parsing JSON data
body: <p>I'm trying to read Tumblr informations via the JSON API (and recuperate the total numbers of post for a blog)</p>
  
  <p>My JS code looks like this:</p>
  
  <pre><code> $.getJSON("http://demo.tumblr.com/api/read/json?callback=?", function(json) { 
      $('.counter').html(json.posts-total);
   });
  </code></pre>
  
  <p>but doesn't work. </p>