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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 - in-flow block-level margins with an element 'height' of 'auto' and 'min-height' of zero</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<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="An element's margins are adjoining and can collapse if the 'min-height' is zero, if it has no top or bottom borders and no top or bottom padding, if it has a 'height' of zero or 'auto', if it has no line boxes and if all of its in-flow children's margins are adjoining." />
<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;
}
#div3
{
background: red;
height: auto;
min-height: 0;
}
#div2, #div5
{
background: green;
height: 1em;
}
#div3, #div4
{
margin-bottom: 2em;
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 id="div4"></div>
</div>
<div id="div5"></div>
</div>
</body>
</html>
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