<!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: Height determination for block-level non-replaced elements in normal flow when 'overflow' computes to 'visible' and elements' margins collapse</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#normal-block" />
<meta name="assert" content="The 'height' is the distance between the top border edge of the top most block-level child box that doesn't have margins collapsed through it, and the bottom border edge of the bottommost block-level child that doesn't have margins collapsed through it. When a block-level non-replaced element is in normal flow, 'overflow' computes to 'visible' and the 'height' is 'auto'." />
<style type="text/css">
#div1
{
position: relative;
}
#div2, #div3, #div4
{
width: 1in;
}
#div2, #div3
{
background: blue;
height: 0.5in;
}
#div2
{
border-top: 0.5in solid blue;
margin-top: 0.5in;
}
#div3
{
border-bottom: 0.5in solid blue;
margin-bottom: 0.5in;
}
#div4
{
background: blue;
height: 2in;
left: 1in;
position: absolute;
top: 0;
}
</style>
</head>
<body>
<p>Test passes if there is a blue square below.</p>
<div id="div1">
<div id="div2"></div>
<div id="div3"></div>
<div id="div4"></div>
</div>
</body>
</html>
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