Zebra Striping Tables with CSS3
http://dev.opera.com/articles/view/zebra-striping-tables-with-css3/

Schmitt, Christopher
Opera
2008

Abstract:

With the advent of CSS3’s nth-child selector, we are able to target multiple elements in a document by creating a "counter" that skips over specified children in the document tree. This allows us, specifically, to style only the odd or even rows of a table. This article details how to use nth-child sucessfully.