jsTree & ajax json call

how to set up ajax call to get data for results nodes

HTML

<script src=" &lt;script type=&quot;text/javascript&quot; src=&quot;http://static.jstree.com/v.1.0pre/jquery.js&quot;&gt;&lt;/script&gt; &lt;script type=&quot;text/javascript&quot; src=&quot;http://static.jstree.com/v.1.0pre/_docs/syntax/!script.js&quot;&gt;&lt;/script&gt; &lt;script type=&quot;text/javascript&quot; src=&quot;http://static.jstree.c"></script>
<script src="http://static.jstree.com/v.1.0pre/jquery.hotkeys.js"></script>
<script src="http://static.jstree.com/v.1.0pre/jquery.jstree.js"></script>
<div id="jstree"></div>

JavaScript

data = [{
    "data": "Basics",
    "state": "closed",
    "children": [{
        "data": "login",
        "state": "closed",
        "children": ["login",
          {
            "data": "results",
            "state": "closed",
            "attr": {
              "id": "node-123"
            }
          }
        ]
      },


      {
        "data": "Basics",
        "state": "closed",
        "children": ["login", "something",
          {
            "data": "results",
            "state": "closed",
            "attr": {
              "id": "node-456"
            }
          }
        ]
      }
    ]
  },
  {
    "data": "All",
    "state": "closed",
    "children": [{
      "data": "AddCustomer",
      "state": "closed",
      "children": ["login", "Add",
        {
          "data": "results",
          "state": "closed",
          "attr": {
            "id": "node-789"
          }
        }
      ]
    }]
  }
]


$(function() {
  $("#jstree").jstree({
    "json_data": {
      "data": data,
      "ajax": {
        "url": "/echo/json/",
        "data": function(n) {
          // get parent / grandparent node
          var lists = $(n).parents('ul');
          var p = $(lists[0]).prev('a');
          var gp = $(lists[1]).prev('a');
          // the result is fed to the AJAX request 'data' option
          return {
            "parent": $.trim(p.text()),
            "grandparent": $.trim(gp.text()),
            "id": n.attr ? n.attr("id").replace("node-", "") : 1,

          };
        }
      }
    },
    "plugins": ["themes", "json_data"]
  });
});