nelegal,
Masked Input
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript" src="http://jquery-joshbush.googlecode.com/files/jquery.maskedinput-1.2.2.min.js" ></script>
<script language="JavaScript" type="text/javascript">
jQuery(function($) {
$('#txt').mask('99/9999/99');
});
</script>
</head>
<body>
<input name="calc" id="txt" class="pole" type="text" size="10" maxlength="10" />
</body>
</html>