Css3 selectors

• http://net.tutsplus.com/tutorials/html-css-techniques/the-30-css-selectors-you-must-memorize
  Excellent post on all selectors includes some less known css 3 selector

• a:active
  When the url of the page is the same that the url in the href attribute of the a tag

• a:after

• p + p All p that are precedated by a p p
  p
  p
  Only the last 2 p will be selected