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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 - negative margins deducted from zero</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-14 -->
<link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" />
<link rel="match" href="margin-collapse-004-ref.xht" />
<meta name="assert" content="Negative margins are deducted from zero if no positive margins are adjoining." />
<style type="text/css">
div div
{
height: 20px;
}
#div1
{
background: blue;
margin-bottom: 0;
}
#div2
{
background: orange;
margin-top: -40px;
}
</style>
</head>
<body>
<p>Test passes if the orange bar is above the blue bar.</p>
<div>
<div id="div1"></div>
<div id="div2"></div>
</div>
</body>
</html>
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