Scroller with dynamic textfield

Hello

I wonder if someone can help me out with this problem.
I have a dynamic textfield with a scrollbar. When pressing a button to load external text the scrollbar, it works fine, but if i scroll down a little and press a new button(wich get new text into the same dynamic textfield). The scollbar wont go to the top and show text from begining.

Why wont it go to the top automatic???
I also wonder if it possible that the scroller can turn invisible if not needed?

Would appriciate any help.

I figuered out my self.
Just used - scroller.setScrollPosition(0);

feels good when that happens, huh? =)

good job, and thanks for posting the update. it helps out other people when searching.