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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 xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS Test: Margin collapsing - top/bottom margins adjoining collapse through</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-15 -->
<link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" />
<link rel="match" href="margin-collapse-002-ref.xht" />
<meta name="flags" content="ahem image" />
<meta name="assert" content="When top and bottom margins are adjoining margins collapse through that element." />
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style type="text/css">
div
{
font: 20px/1em Ahem;
width: 5em;
}
#div1
{
background: url('support/margin-collapse-2em-space.png');
height: 4em;
}
#div2, #div4
{
background:green;
height: 1em;
}
#div3
{
background: red;
height: 0;
}
#div2, #div3
{
margin-bottom: 2em;
}
#div3, #div4
{
margin-top: 2em;
}
</style>
</head>
<body>
<p>Test passes if there is <strong>no red</strong>.</p>
<div id="div1">
<div id="div2"></div>
<div id="div3"></div>
<div id="div4"></div>
</div>
</body>
</html>
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