<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>CSS Test: Containing block for absolute positioning</title> <link rel="author" title="Boris Zbarsky" href="mailto:bzbarsky@mit.edu"/> <link rel="reviewer" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact"/> <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#containing-block-details"/> <link rel="match" href="abspos-containing-block-001-ref.xht" /> <style type="text/css"> html { border: 100px solid red; background: red; } div { background: white; color: green; position: absolute; bottom: 0; left: 0; width: 100%; height: 100%; } </style> </head> <body> <div> Test passes if there is <strong>no red</strong>. </div> </body> </html>