From any button script, how can I reset the scrollbar of a field to the "top" ?

[Francis Nugent Dixon]

Hi from Beautiful Brittany,

This is a beginners question (except that I am not a beginner)
I've tried everything I know to do this, but all the commands
I tried came up with an error. Sounds stupid, don't it ?

Is there a soul to help me out ?

-Francis