<html>
<head>
   	<title></title>
</head>
<body>
    The purple box should stick to the bottom of the window.
    <script>
        document.body.offsetTop;    // Force layout now.
    </script>
    <div style="height: 2000px; width: 1px; position: absolute;">
    </div>
    <div style="position: fixed; bottom: 0; height: 100px; width: 100px; background: purple;"></div>
    <!-- Try to load a resource. -->
    <span style="display: none; background-image: url(data:image/png,);"></span>
</body>
</html>