insert automatically into text filed after selection radiobutton

Hi,

I'm sorry, in the first place, for my bad english.

I need that after selection of radiobutton appear text into textfield.

Es.

option 1

option 2

option 3

if select option 1 into textfield "direzione" appear " servizi sociali"

if select option 2 into textfield "direzione" appear " affari istitzionali"

etc etc.

I need code javascript for livecycle and where I must insert it

It's Possible?

thank you very much