Reseting text in textfield (using scroll property?)

Hello and please help.

I have a text field which I fill with text and I made a scrollbar for it following a tutorial I found in flashkit.
Everything works quite ok, but… I need to use prev and next button to change the text in the field. That’s not a problem, the only problem is that after I changed the text, it remains in the same position as the previous text (I mean - if the user scrolls down, then clicks “next”, the next text is scrolled down, too). Is there any property that would set the text back to it’s top in the text field? Thanks a bunch!