Re: Dynamic imagemaps

Neil St.Laurent (
Fri, 7 Mar 1997 06:38:16 -0600

From: "Neil St.Laurent" <>
Date: Fri, 7 Mar 1997 06:38:16 -0600
Subject: Re: Dynamic imagemaps
Message-Id: <>

> As CSS, JSSS, Dynamic HTML, and vector graphics come into use, the
> current pixel-based imagemap spec will be inadequate. Imagemap
> coordinates should be spec'able in percentage values, where
> percentage refers to the dimensions of the image to which the map is
> applied. A map specified with percentage values would still be valid
> no matter how the image size is spec'ed or dynamically changed.

When/If this happens it would be nice to see very clear precise 
details of how the relative values are to work (I can't seem to find 
them on current image maps).  By this I mean it should be clearly 
stated when calculating the absolutes from relatives, whether the 
values should be rounded up, down, or to the nearest (and what 
strategy).  It would also be helpful to know exactly how to determine 
whether a point is inside a region: should a specific circle 
algorithm be used, is the lower right side of the rectangle inside 
the rectangle?

I know this may seem a little odd, but the rounding and lower-right 
side of the rectangle makes a significant difference when areas are 
flush with other areas.

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