function finestralogin()
{
winlogin=window.open("login.php","login","width=430,height=450,left=250,top=50,resizable=no,menubar=no,toolbar=no,location=no,status=no");
}

function aggiorna()
{
window.location.reload();
}

function logout()
{
winlogout=window.open("logout.php","logout","width=0,height=0,left=0,top=0,resizable=no,menubar=no,toolbar=no,location=no,status=no");
}