Combobox smooth scroll in AS2

I am making a webTV player, and I have a combobox displaying the entries. When scrolling the combobox, the scrolling jumps between the entries. I would like to have it scroll though the entries smoothly and not jump. Is there some way to achieve this?

Here is the site as it is now: http://filer.inviso.no/temp/test.html

Sincerely, Tharald