yeah, i thought the same thing. it must have been an error on the part of the author. here it is in the CSS2.1 spec -- http://www.w3.org/TR/CSS2/visuren.html#d

yeah, i thought the same thing. it must have been an error on the part of the author. here it is in the CSS2.1 spec -- http://www.w3.org/TR/CSS2/visuren.html#display-prop http://www.w3.org/TR/CSS2/visuren.html#display-prop it looks like it was introduced in CSS 2.1 because it is missing in CSS2 and CSS1: http://www.w3.org/TR/2008/REC-CSS2-20080411/visuren.html#display-prop http://www.w3.org/TR/2008/REC-CSS2-20080411/visuren.html#dis... http://www.w3.org/TR/REC-CSS1/#display http://www.w3.org/TR/REC-CSS1/#display