<head>
<style>
div { width: 100px; height:100px; position: absolute; background-color: green }
</style>
</head>
<body>
You should see four green squares in a vertical line below.
<div style="top:160px; -webkit-box-reflect: below 20px; opacity:0.5">
<div style="top:240px;"></div>
</div>