I got 2 questions about dynatree's nodes, here are these:
1. When defining a node, the default key of the node is null. But
I find it's not true. I always get a _3 like key by node.data.key.
How the keys of nodes are generated? Should I assign them when I
create nodes, if I want to use them later?
2. In a dynatree, the titles of nodes should be unique or I can
use the same title for different nodes?
Thanks for any suggestions.