codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Gestione Report</title>
<script language="JavaScript">
function validazione(){
with(document.modulo_login) {
	if(NN.value=="") {
	alert("ATTENZIONE! Inserire l'username");
	NN.focus();
	return false;
	}
	if(PW.value=="") {
	alert("ATTENZIONE! Inserire la password");
	PW.focus();
	return false;
	}
}
return true;
}		
</script>
</head>
<body bgcolor="rgb(223,233,244)">
<table border="1" width="100%" height="100%"><tr><td align="center" valign="middle">
<table border=0>
<form name="modulo_login" onSubmit="return validazione();" method="post" action="Gestione.php">
  <tr>
  <td align="left">Username: </td><td align="right"><input type="text" name="NN" size="15" maxlength="100"></td>
  </tr>
  <tr>
  <td align="left">Password: </td><td align="right"><input type="password" name="PW" size="15" maxlength="100"></td>
  </tr>
  <tr>
  <td colspan="2" align="right"><input type="submit" name="GO" value="Login"></td>
  </tr>
</form>
</table>
</td></tr></table>
</body>
</html>
Io ho questo codice, non riesco a capire perchè non si allinea a centro dello schermo come vorrei io ... ??? Ciao, Grejo.