Reference

stu nicholls | CSS PLaY | cross browser multi page photo gallery
http://www.cssplay.co.uk/menu/lightbox.html#flower8

Suckerfish HoverLightbox | Monday By Noon
http://www.mondaybynoon.com/2006/03/27/suckerfish-hoverlightbox/

via

GIGAZINE - JavaScriptは使わずCSSだけで作られたイメージギャラリー
http://gigazine.net/index.php?/news/comments/20060402_cssonly/