function validate_newzapp_email(field, alerttxt) {
    with (field) {
        apos = value.indexOf("@");
        dotpos = value.lastIndexOf(".");
        if (apos < 1 || dotpos - apos < 2)
        { alert(alerttxt); return false; }
        else { return true; }
    }
}
function validate_newzapp_signupform(thisform) {
    with (thisform) {
        if (validate_newzapp_email(Address, "please enter a valid email address") == false)
        { Address.focus(); return false; }
    }
}

function clearInput(field) {
    field.value = "";
}