[jQuery] A general Javascript question: duplicate IDs in a document?

[jQuery] A general Javascript question: duplicate IDs in a document?


I realize this is not jQuery specific, but I figured you guys might
have some good advice...
I often find myself wanting to assign the same ID to multiple elements
in a document -- typically when there are several versions of an
element which display at different times. Is there a good reason NOT
to do this? If so, what's a better practice?
thanks,
Kim