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javascript color depth

Posted on 1998-11-12
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Last Modified: 2008-03-03
How can i find the color depth of a visitors PC using Javascript
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Question by:spikes
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Expert Comment

by:Grdv
ID: 1273943
just use:
screen.colorDepth
//Grdv
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Grdv earned 100 total points
ID: 1273944
was meant as an answer
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Expert Comment

by:kollegov
ID: 1273945
Note that screen object inplemented first in NN4 version.
So you should check for earlier versions of browsers, before you
could use it.
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Expert Comment

by:Michel Plungjan
ID: 1273946
or just
if (window.screen) ColD = screen.colorDepth;
colorDepth in N4 isn't adapted for that purpose, returning
the # of bits available for composing a palette
color mode:_256_64K_16M
pixelDepth:___8__16__24
colorDepth:__18__16__24

'scuse the formatting

so a the better test would be

if (window.screen) {
      ColD = screen.pixelDepth
               ? Math.pow( 2, screen.pixelDepth ) // in N4
               : Math.pow( 2, screen.colorDepth ) // in E4
}

Michel

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