I have been using a style class to control scrolling in DIVS that looks like these:
In the frames columns, there is usually a div above the scrolling div, that I have a fixed position on, like this:
This permits the lower div to scroll under the upper div, without the upper div moving.
The different height adjustments are needed, as at 100%, the bottom of the scroll doesn't always show up. You have to adjust the height per usage, which seems to be effected by the size of the Caption Div, although 95% seems to work well consistenly.
This design also compensates for different resolutions and window sizes. I used Class, so I could also input other designs in as an ID.
<Div Class=ColmScroll95 ID=Colorscheme>