<html>
<head>
    <style type="text/css">
        div {
            width: 50px;
            height: 50px;
            border: 50px solid black;
            margin: 10px;
        }
    </style>
</head>
<body>
    <!-- Check behavior of prefixed border-radius with two values. -->
    <div style="-webkit-border-radius: 30px 75px;"></div>
    <div style="border-radius: 30px / 75px;"></div>
</body>
</html>