javascript library for building tree-node hierarchy

Question

I am looking for JavaScript library that can perform the following tasks:

1. Dynamically generate tree (graph-node) (hierarchy structure of data)
2. Can connect nodes together
3. Zoom option for graph area
4. labels for each node

Basically, like familyecho.com? Where can I find a library that has the same functionality? If any of you know any library that can perform all these task, then please do reply me.

Answer 1

You can try infovis: http://thejit.org/

Tree example: http://thejit.org/static/v20/Jit/Examples/Spacetree/example1.html