The Keep-track's not a bad idea, or some other site
link...though what you really ought to include in
the popup is a line of code that will cause the
popup to disappear on its own if it's not clicked
within 5-10 seconds. It's a pretty easy function
(though of course I can't remember it off the top
of my head), and would go a long way towards making
the little bugger less obtrusive.