100px;
                width: 100px;
            }
            #left
            {
                border-right: 10px solid black;
            }
            #right
            {
                border-left: 10px dotted red;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is no red visible on the page.</p>
        <div id="test">
            <div id="tr">
                <div id="left"></div>
                <div id="right"></div>
            </div>
 