function open_conditions(URL) { window.open(URL,'conditions', 'menubar=no,copyhistory=no,status=no,directories=no,location=no,toolbars=no,scrollbars=yes,resizable=no');
}

function ph_increase (i) {
    return true;
}

function existing_customer() {
    document.getElementById("customer").style.visibility = "hidden";
    document.getElementById("existingcustomer").style.visibility = "visible";
}
function new_customer() {
    document.getElementById("existingcustomer").style.visibility = "hidden";
    document.getElementById("customer").style.visibility = "visible";
}

function forgotten_userpass() {
    document.getElementById("existingcustomer").style.visibility = "hidden";
    document.getElementById("forgottenuserpass").style.visibility = "visible";
}