            bottom: 1in;
                margin-bottom: auto;
                margin-top: 0.5in;
                position: absolute;
                top: 0.5in;
                width: auto;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is no red visible on the page.</p>
        <div id="div1">
            <iframe height="50%"></iframe>
            <div></div>
        </div>
    </body>
</html>