Editing Image map (section)

==Server-side==
'''Server-side image maps''' were first supported in [[Mosaic (web browser)]] version 1.1.<ref>{{cite web|url=http://1997.webhistory.org/www.lists/www-talk.1993q2/0343.html|title=IMG extension for Mosaic 1.1}}</ref>  Server-side image maps enable the [[web browser]] to send positional information to the server about where the user clicks within an image.  This allows the server to make pixel-by-pixel decisions about what content to return in response (possible methods are to use image mask layers, database queries, or configuration files on the server).

The [[HTML]] code for this type of server-side image map requires the <code><img></code> tag to be inside an anchor tag <code><a>...</a></code> and the <code><img></code> must include the <code>ismap</code> attribute.
<syntaxhighlight lang="html">
<a href="/imagemapper"><img src="image.png" ismap /></a>
</syntaxhighlight>
When the user clicks inside the image the browser will append the X and Y coordinates (relative to the upper-left corner of the image) to the anchor [[URL]] as a [[query string]] and will access the resulting [[URL]]<ref>{{cite web|url=http://www.w3.org/TR/html-markup/|title=HTML: The Markup Language (an HTML language reference)}}</ref> (for example, <code>/imagemapper?3,9</code>).

If the browser does not support <code>ismap</code> then the [[query string]] must not be added to the anchor [[URL]] and the server should respond appropriately (for example, by returning a text-only navigation page).