the openair skin for wordpress does transparency in a neat way. rather than an opacity/alpha filter CSS property, it sets the background to transparent with a tiled background. the tiled background is a 75% opaque white png file.
if the browser supports that, it looks great.
if the browser doesn’t support the transparency (or translucency i suppose?), it just shows up as white.
i’ll have to remember that. i like that better than the opacity property, since then other elements within that div are still properly opaque (like photos).
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