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=utf-8" />
<title>Documento senza titolo</title>

<style type="text/css">
#contenitore {
	width: 100%;
}
#TextArea {
	font-weight: bold;
	text-align: left;
	border: #000 2px solid;
}
</style>
</head>

<body>
<div id="contenitore" align="center">
<form action="" enctype="text/plain" method="post">
<textarea id="TextArea" cols="20" rows="20">Contenuto</textarea>
</form> 
</div>
</body>
</html>