Dynamically reordering lists on web pages

[Geoff Soper]

I'm thinking about how to let a user reorder a group of things on a webpage,
either a list of textual strings or a group of pictures. I'm thinking of
being able to drag the elements around, and having the dragged element snap
to a position between the existing elements. Upon letting the mouse go the
list would then reorder itself accordingly and change some hidden array that
would be submitted when the required new order is achieved.

Does this sound sensible? Has anyone seen this done before anywhere? I've
spoken about it to a friend and they warned me not to go anywhere near it so
I'm slightly reluctant to start from scratch unless I really need to.

Thanks,
Geoff