function handleEnter(e) {
    var characterCode;
    if (e && e.which) {
        e = e;
        characterCode = e.which;
    }
    else {
        e = event;
        characterCode = e.keyCode;
    }

    if (characterCode == 13) {
        parent.location.href = "join-e-newsletter.aspx";
        return false;
    }
    else {
        return true;
    }
}