If web.map is a server-side imagemap, you'll need a syntax like this:

    <a href="http://www.confluent.com/cgi-bin/imagemap/images/web.map">
    <img src="images/web.gif" ismap>
    </a>

where the http://www.confluent.com/cgi-bin/imagemap is a
system-defined path to your map in images/web.map.

You can combine the two imagemap types into one. Browsers that support
client-side maps will use the client-side map info, and browsers that
don't will use the server-side map info.

    <a href="http://www.confluent.com/cgi-bin/imagemap/images/webserver.map">
    <img src="images/web.gif" ismap usemap="images/webclient.map#testmap">
    </a>

assuming webserver.map and webclient.map are map files containing
server-side and client-side maps, respectively.
