Div Centralizada

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Div Centralizada</title>
<style type="text/css">
<!--
#central {
 margin: auto;
 width: 750px;
 background-color: #FFFFFF;
}
body {
 background-color: #CCCCCC;
}
-->
</style>
</head>

<body>
<div id="central">...</div>
</body>
</html>