L'attributo non è scrolling, ma overflow:
codice:
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Documento senza titolo</title>
<style type="text/css">
<!--
#box {
	background-color: #CCFFFF;
	height: 100px;
	width: 200px;
	border: 1px solid #006699;
	overflow: auto;
}
-->
</style>
</head>

<body>
<div id="box">
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</div>
</body>
</html>