/CSS21/box.html#border-width-properties" />
        <meta name="flags" content="" />
        <meta name="assert" content="The 'border-bottom-width' property supports a nominal length value in inches that has a plus sign before it." />
        <style type="text/css">* { margin: 0; padding: 0 }
            div
            {
                display: inline-block;
                width: 1in;
            }
            #reference
            {
                background-color: black;
                h