function login()
{
	var username = document.formLogin.username.value;
	var password = document.formLogin.password.value;
	if ((username == "") || (username.length == 0))
	{
		alert("Inserire l\'username");
		document.formLogin.username.focus();
		return false;
	}
	if ((password == "") || (password.length == 0))
	{
		alert("Inserire la password");
		document.formLogin.password.focus();
		return false;
	}
	return true;
}