[imp] Better tooltips

[Chuck Hagenbuch]

Quoting Michael M Slusarz <slusarz at bigworm.colorado.edu>:

> The DOM tooltip library provides clean, fast output in a fairly small
> package (the two JS files that need to be included are 30 KB - they
> theoretically can be cached by the browser since they are called via a
> <script src=""> tag).
> 
> Sample output looks like:
> http://bigworm.colorado.edu/imp/domtt.jpg
> 
> Let me know what you think.

Sounds good for this and possibly other limited situations, with a fallback
to either title="" or the current way of showing previews.

-chuck

--
Charles Hagenbuch, <chuck at horde.org>
I know there's fish out there, but where g-d only knows.