in reply to multi-select html forms

The user inteface for this is determined by the browser and the windowing system. It's nothing to do with your CGI program.

Ctrl-click is a common way of making non-contiguous selections. That may work for your users.

--
<http://www.dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg