You can of course do this using server modifications. I'm not sure if
NCSA's processed files support includes, but they certainly don't provide
the #if capabilities that you really want.  We do it by inserting an
intermediate script into the process - sort of  meta-server.  That way you
can add support for includes or if conditions.  We do #if's on everything
from inline JPEG support to whether the browser supports tables, tables
with images, tables with forms and recursive tables (gotta love moving
standards!).
Kee Hinckley      Utopia Inc. - Cyberspace Architects=81    617/721-6100
[email protected]                               http://www.utopia.com/
I'm not sure which upsets me more: that people are so unwilling to accept
responsibility for their own actions, or that they are so eager to regulate
everyone else's.