nk rel="help" href="http://www.w3.org/TR/CSS21/box.html#propdef-border-left-width" />
        <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#border-width-properties" />
        <link rel="match" href="../reference/ref-if-there-is-no-red.xht" />

        <meta name="flags" content="ahem" />
        <meta name="assert" content="The 'border-left-width' property supports a minimum length value in 'ex' units that that has a minus sign before it." />
        <link rel="stylesheet" type="text/css" href