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Overview of CSS3 Structural pseudo-classes

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CSS's goal of "separating style from content" relies heavily on its ability to reach that content first. Well, in CSS3, that mission is bolstered by the addition of Structural pseudo-classes. These selectors let you select child elements of a parent based on a variety of generic criteria, such as the 3rd child, even/odd child elements, the nth child within each group of children of a certain type (ie: LI) within the parent, and more. A little overwhelming, yes, but it's sure better than underwhelming, right?
Meanwhile back in the real world, CSS3 Structural pseudo-classes are supported in Firefox 3.1+, IE8+ (only in IE8 standards mode), and Safari 3.1+ to  various degrees, so they are usable right away.  more...

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