<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>
<title>CSS Test Reference</title>
</head>
<body>
<div style="width: 100px; border: 1px solid green;">
<div style="display: block; height: 20px; width: 80px; margin: 10px 10px 10px 0; border: 5px solid black"></div>
</div>
</body></html>