title: how to add a custom querystring parameter on Ajax call of AciTree jQuery plugin
body: <p>I am using a jQueryI want to send a custom querystring parameter along with node_id, e.g _type which is in json as shown below</p>
  
  <pre><code>[{
      "id":"2",    
      "label":"Title for folder",    
      "branch":[],    
      "inode":true,    
      "open":false,    
      "icon":"folder",    
      "_type":"library"
  }]
  </code></pre>
  
  <p>I am trying with <code>ajaxhook</code> as shown below</p>
  
  <pre><code>ajaxHook: function (item, settings) {
      // the default implementation changes the URL by adding the item ID at the end    
      alert(this.itemData._type);    
      settings.url += (item ? this.getId(item) : '');    
  }
  </code></pre>
  
  <p>I am unable to get my custom property <code>_type</code> using this method. </p>