Re: LYNX-DEV Can Lynx do anything with ISMAPs

[Foteos Macrides]

address@hidden (Scott McGee (Personal)) wrote:
>[...]
><IMG SRC="http://www.slcc.edu/maps/hp_menu.gif"; HEIGHT=252
>WIDTH=187 ALT="[Menu]" BORDER="0" ALIGN="middle" USEMAP="#hp_menu">
>
>with the map defined within a <MAP> tag somewhere in the HTML file (with
>a name of hp_menu). To do both, just combine to get:
>
><A HREF="http://www.slcc.edu/cgi-bin/imagemap/maps/hp_menu.map";>
><IMG SRC="http://www.slcc.edu/maps/hp_menu.gif"; HEIGHT=252
>WIDTH=187 ALT="[Menu]" BORDER="0" ALIGN="middle" USEMAP="#hp_menu" ISMAP></A>
>
>again with the map somewhere in the HTML file.
>
>Pros and cons on the two types of mapping:
>
>  Server side maps are more commonly understood, but do not (and can not)
>  provide desitination info. Modifying the map can be done by just changing
>  the map file.
>
>  Client maps are becoming more commonly understood, and provide desination
>  info, but require recoding of the HTML file to modify the map.
>
>  Using both gives as nearly universal support of image maps as you are 
>  likely to get, but does mean that changing the map now requires changing 
>  both the HTML file and the map file.
>
>You will notice that on our site (http://www.slcc.edu/) that most pages (not
>the home page, though) have a menu bar at the bottom. This is done as a 
>purely server side map because if I want to modify the menu bar, I don't 
>want to have to go in and modify a couple of thousand (yes, we really have
>that many page!) HTML files too. As is, I make a change in the image is 
>needed, and then change the .map file and every page reflects the change.

        Note that MAPs do not need to be in the same documents which
reference them.  A bug in Netscape prevents seeking MAPs in other
documents, but all other browsers implemented MAP properly, and
presumeably Netscape will fix its bug, someday.  So you can have
separate pages with MAPs, which you maintain independently of the
documents which reference them, just as for server-side maps.  You
also can have collections of MAPs in one document, which will be
cached and used when referenced by other documents.  That's a
much more efficient design (too bad about the Netscape bug, though,
such that people feel compelled to reproduce MAPs in every page
which references them).

                                Fote

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 Foteos Macrides            Worcester Foundation for Biomedical Research
 address@hidden         222 Maple Avenue, Shrewsbury, MA 01545
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