[flexcoders] Manipulating tree label programmatically

[nhid]

Hi,

I am trying to change the label of a tree item for when the item is
selected.

branch1
     child1A
branch2
     child2A
          child2Aa
          child2Ab

First problem is I need to add a character, lets say #, to the label, so
when I click on child1A, it should now display #child1A.

Second problem is changing the style of the label, bolding it, to the label,
so when I click on branch2, it should now display *branch2*.

Any idea is greatly appreciated.