How to create dynamic directory tree?

[EdwardKing]

I want to create a dynamic div+css directory tree,when I click some directory node,it will dynamic read database while show "loading...",then expand the node with search result.I have no idea about it. I want to know where can I get above free example code?
Thanks in advance.

[oesxyl]

I want to create a dynamic div+css directory tree,when I click some directory node,it will dynamic read database while show "loading...",then expand the node with search result.I have no idea about it. I want to know where can I get above free example code?
Thanks in advance.
http://oat.openlinksw.com/

Complete Widgets -> Tree Control
or
Complete Widgets -> WebDAV Browser

best regards