idea about pseudo-selectors

I had an idea for something like this... from what I see in the CSS3 
working draft, there's |:nth-child| and :nth-child-of-type etc, but how 
would one, say cover odds and evens?

A lot of people, esp. in tabular data, want to have every second row 
coloured a different way. The way we do it is assigning a class to every 
second row. Or using javascript/some other scripting method to do it?

What about an |:odd-child|, |:odd-child-of-type|, |:even-child|, and 
|:even-child-of-type|?

Wouldn't those be awesome pseudo-selectors?

-- 

*Guan Ming Teo*
Web Developer

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