<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>CSS Test: Element position based on containing block</title> <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-03-09 --> <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#containing-block" /> <link rel="match" href="reference/ref-filled-green-100px-square.xht" /> <meta name="flags" content="" /> <meta name="assert" content="An element's position is based on the position of its containing block." /> <style type="text/css"> div { background: red; height: 100px; width: 100px; } div div { background: green; } </style> </head> <body> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div> <div></div> </div> </body> </html>