<!DOCTYPE HTML> <html> <title>CSS 2.1 Test Suite: Test for containing block for absolutely positioned elements being initial containing block</title> <link rel="author" title="Robert O'Callahan" href="mailto:robert@ocallahan.org" /> <link rel="author" title="Mozilla Corporation" href="http://mozilla.com/" /> <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#containing-block-details" /> <meta name="assert" content="If there is no such ancestor, the containing block is the initial containing block." /> <meta name="flags" content="" /> <body style="position:absolute; width:50%; height:50%; top:50px; left:50px; margin:0; border:10px solid black;"> </body> </html>