Controlling 2 scrollers in 1 swf

I have 2 dynamictext boxes that have scripts applied to buttons that scroll the text. I’m still new to AS so I dont know which part of the AS to change to make the scrollers move the text boxes independately.

I have attached the fla of the scroller example so it is easier to understand what I’m trying to do. I ahve changed the text so that it is this and _parent instead of _root.