. _:vb50819878 . "2008-04-11" . . _:vb50819878 . . . _:vb50819877 . "Cascading Style Sheets (CSS1) Level 1 Specification" . _:vb50819876 . _:vb50819876 . _:vb50819877 . _:vb50819876 "H\u00E5kon Wium Lie" . . _:vb50819878 . . _:vb50819877 "Bert Bos" .