     line-height: -1cm;
            }
            #div4
            {
                height: 1em;
                left: 2em;
            }
        </style>
    </head>
    <body>
        <p>Test passes if the height of the blue box is similar to the height of the black boxes. It is acceptable to have the blue box height be shorter or taller than the height of either of the black boxes. The black boxes represent the recommended settings for 'line-height'.</p>
        <div id="div1">
            <div id="div