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Imagemaps
can provide a graphical navigation interface to a web
site. If the mouse is clicked over an imagemap image,
the coordinates of the click are sent to the server. The
server then determines which page to return based on the
location of the click.
Traditionally, imagemaps
have been implemented at the server end with a CGI program
(usually called "imagemap"). This is configured
with a map file that lists what regions on the image
correspond to what documents. Apache can use CGI imagemaps,
but it is more efficient to use the internal imagemap
module. This module, compiled by default, means that
the server does not need to run a separate process to
handle the image clicks. Both of these approaches implement
"server-side imagemaps," because all of the
processing happens on the server.
For more information,
see Apache
Week Article
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