
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#containing-block-details" />
        <link rel="match" href="containing-block-008-ref.xht" />

        <meta name="assert" content="If the element has 'position: absolute', the containing block is established by the nearest positioned ancestor." />
        <style type="text/css">
            #div1
            {
                border: solid black;
                margin: 50px;
                position: absolute;
                top: 0;
