title: Sample jsTree code not working
body: <pre><code>&lt;!DOCTYPE html&gt;    
  &lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;Demo&lt;/title&gt;
  &lt;script type="text/javascript" src="../_lib/jquery.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../_lib/jquery.cookie.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../_lib/jquery.hotkeys.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../jquery.jstree.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript""&gt;
      alert($().jquery);
      alert($().jstree._themes);
  
      $(function () {
          $("#tree").jstree({
              "json_data" : {
                  "ajax" : {
                      "url" : "/home/antonio/tomcat/webapps/jstree/_docs/_json_data.json",
                      "data" : function (n) {
                          return { id : n.attr ? n.attr("id") : 0 };
                      }
                  }
              },
          "plugins" : [ "themes", "json_data" ]
      });
  });
  
  &lt;/script&gt;
  
  &lt;/head&gt;
  &lt;body&gt;
      &lt;h&gt; Hello &lt;/h&gt;
      &lt;div id='tree'&gt;&lt;/div&gt;
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Okey, the main problem is that the sample code is not working. 
  When i try to display this page the animation of loading the tree appears but it hangs forever and it does not show anything.</p>
  
  <p>The version of the jquery appears correctly.
  And the next alert as well.</p>
  
  <p>What i'm doing wrong?</p>