topr8 - 10:07 pm on Oct 22, 2011 (gmt 0)
i stand corrected, glad of the info.
however it is insane to put such a rule in your style sheet as you will be serving worthless bandwidth. (which when served millions of times over the year comes to quite a lot)
also it saves you nothing as every year you will still have to change the style sheet, you may as well do it in php or similar on the page anyway.