I built my own dhtml scroller from scratch,
demo here. (Mouse over the rectangle with arrows a left and right.)
It works fine but I don't like that when the scroller goes to the right, the page gets a horizontal scrollbar at the bottom. There's no content to scroll to (it's hidden with css clip), and just looks ugly.
I believe there must be a way to clip the contents of the scroller so that the browser _knows_ it doesn't exist short of using iframes, which I'd like to avoid. I prefer w3c standards, but if I have to use a proprietary method I will.
Any tips at all are appreciated, including a better forum to ask this question in.