ent="image" />
        <meta name="assert" content="The 'height' is the used width divided by the ratio when an absolutely positioned replaced element has an intrinsic ratio, 'height' is set to 'auto', with over-constrained values solves for 'bottom'." />
        <style type="text/css">* { margin: 0; padding: 0 }
            #div1
            {
                border-top: solid black;
                position: relative;
            }
            div div
            {
                background: bl