[jQuery] scrolling window when draggable leaves viewport?

[jQuery] scrolling window when draggable leaves viewport?

Hi there,
is it possible to get a scrolling feature for any drag/droppable?
For Example:
If you leave the viewport with an object and the document body is longer
or wider than the viewport, the document scrolls connected to the mouse
position.
You can see a good example at this YUI demo:
<http://developer.yahoo.com/yui/examples/dragdrop/ontop.html?mode=dist>
Is somebody working on it or did I miss it in the documentation? Or is
there a simple way to implement this feature?
regards
ecki
(maybe this mail appears 2x, my first attempt didn't appear in the mailing list)
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