<!DOCTYPE html>
<head>
<title>DIV CENTER CSS</title>
<style type="text/css">
#taso1 {
width: 780px;
margin-right: auto;
margin-left: auto;
}
</style>
</head>
<body>
<div id="taso1">
<p>Sisältöä</p>
</div>
</body>
</html>