Follow these links. Already visited links should appear on bottom of the list :
Using flexible box model (box, box-flex, box-ordinal-group), generated content (:before, :after), :not and :first-of-type selectors
OK on Firefox 3.6, Safari 4+, Chrome 4+
(doesn't work on IE6/8 nor Opera 10.53)
Doesn't work on Firefox 3.7+ due to a :visited bug fix
Author : Raphael Goetter