h0w i can get a browser window on selection of item from tree-widget(item-based)

[jyoti]

hi all

i want to know the code for view like this

parent1
:
:------------>sub11
:------------>sub12
parent2
:
:------------>sub21
:------------>sub22
.
.
.
so on


i want that when i select sub11 then an external page should be opened like"google.com"
n when i select sub22 then another external page should be opened"qtforum.org"

plz tell me as soon as possible
thanks in advance