Easing text box

Hey all,
Have you seen those ‘easing’ text boxes on some web sites?
I would like to know if theres a tutorail on the net on how to make them before a take a shot at making it my self.
i googled it but nothing really came up…
my text will by dynamicailly loaded so i would think i’d use the maxscroll paramter to get me the max end of the text field that link a scroll bar’s x axis to proportionally scroll the text box. am i on the right track.