tree similar to example 1. the special things here are:
- using selfmade icons. this is done by just setting another image dir. the images in this new dir are all named the same way.
- you don't see lines because the line-images in this dir are empty.
- this example does not draw the tree into a div after the page loaded (with an onLoad code) as most other examples do it). Though this way of doing it is not recommended.