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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS Test: Margin Collapsing: top margins</title>
<link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch"/>
<link rel="alternate" href="http://www.hixie.ch/tests/adhoc/css/box/block/margin-collapse/041.html" type="text/html"/>
<link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins"/>
<style type="text/css">
.test { background: aqua; margin: 0; width: 6em; border: solid; }
.test .a { height: 1em; background: fuchsia; margin: 0; }
.test .b { background: red; margin: 0; }
.test .c { float: left; height: 1em; width: 3em; background: orange; margin: 0; }
.test .d { height: 1em; background: yellow; margin: 1em 0 0 0; }
.control { width: 6em; border: solid; }
.control .a { border-top: fuchsia 1em solid; }
.control .b { border-top: aqua 1em solid; }
.control .c { border-left: orange 3em solid; border-right: yellow 3em solid; height: 1em; }
</style>
</head>
<body>
<p>The two boxes below should look identical.</p>
<table>
<tr>
<td>
<div class="test">
<div class="a"></div>
<div class="b">
<div class="c"></div>
<div class="d"></div>
</div>
</div>
</td>
<td>
<div class="control">
<div class="a"></div>
<div class="b"></div>
<div class="c"></div>
</div>
</td>
</tr>
</table>
</body>
</html>
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