<!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' xml:lang='en'>
<head>
<title>margin</title>
<style rel='stylesheet' type='text/css'>
body {
margin: 0;
padding: 0;
}
div {
width: 100px;
height: 100px;
background: lightyellow;
border: 1px solid gold;
}
div#top {
margin: 10px 20px;
}
div#bottom {
margin: 20px;
}
</style>
</head>
<body>
<div id='top'></div>
<div id='bottom'></div>
</body>
</html>
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