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I am using the following three lines in CSS to enable smooth transitions between "slides", but line #1 fails W3C CSS validation. 

filter: progid:DXImageTransform.Microsoft.alpha(opacity=100);
-moz-opacity: 1;
opacity: 1;

Is there a way to reformulate the same intent (smooth transitions through alpha blending) but with methods that won't fail validation?

Carl J.
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2 Answers2

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You can use IE conditional comments to serve a different stylesheet with the filter in it.

meder omuraliev
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Check out CSS Opacity Properties? , they are using " " around progid:DXImageTransform.Microsoft.alpha(opacity=100) which clears validation.

I assume the CSS still works correctly.

Community
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Roger
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