Name
ISMAP — NN all IE all HTML all
Synopsis
ISMAP
Optional
The Boolean ISMAP
attribute tells the browser that
the IMG
element is acting as a server-side image
map. To turn an image into a server-side image map, wrap the
IMG
element with an A
element
whose HREF
attribute points to the URL of the CGI
program that knows how to interpret the click coordinate information.
The browser appends coordinate information about the click to the URL
like a GET
form method appends form element data
to the ACTION
attribute URL. In the following
example, if a user clicks at the coordinate point 50, 25, the browser
sends "http://www.giantco.com/cgi-bin/nav?50,25"
to the server. A server CGI program named nav
might examine the region in which the coordinate point appears and
send the relevant HTML back to the client.
More recent browsers allow client-side image maps (see the
USEMAP
attribute), which operate more quickly for
the user because there is no communication with the server to carry
out the examination of the click coordinate point.
Example
<A HREF="http://www.giantco.com/cgi-bin/nav" TARGET="main"> <IMG SRC="navbar.gif" ISMAP HEIGHT=90 WIDTH=120> </A>
Value
The presence of the attribute turns the feature on.
Default
Off.
Object Model Reference
- IE
[window.]document.imageName.isMap
[window.]document.images[i].isMap
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