Ext and Trees
*************
Layerswitcher for example is example of such `TreePanel
<http://www.extjs.com/deploy/dev/docs/?class=Ext.tree.TreePanel>`_.

Lets define the TreePanel and root `TreeNode
<http://www.extjs.com/deploy/dev/docs/?class=Ext.tree.TreeNode>`_, see
`08_trees.html <../_static/08_trees.html>`_ example:

.. literalinclude:: ../_static/08_trees.html
    :language: javascript
    :linenos:
    :lines: 10-20

Now, append child node to root node:

.. literalinclude:: ../_static/08_trees.html
    :language: javascript
    :linenos:
    :lines: 22-24