<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>子div在父div中置底</title>
<style type="text/css">
.father { width: 500px; height: 600px; position: relative; background-color: AliceBlue; }
.child { width: 100%; height: 100px; position: absolute; bottom: 0; background-color: AntiqueWhite; }
</style>
</head>
<body>
<div class="father">
<div class="child">
</div>
</div>
</body>
</html>