function OnSubscribe(f) {
    if (f.Email.value == 'enter your email') {
        f.Email.select();
        f.Email.focus();
        alert('Please, enter a valid email.');
        f.Email.focus();
        return;
    }
    var r = SetAjax('/System/Server/Ajax.php?Cmd=Subscribe&Email=' + escape(f.Email.value));
    //alert(r);
    alert('All right! Thanks for your subscription.');
    SetCookie('subscribed', 1);
    f.Email.value = 'enter your email';
    f.Email.focus();
    f.parentNode.removeChild(f);
}
function OnSubscribeFocus(el, enter) {
    if (enter) {
        if (el.value == 'enter your email') {
            el.value = '';
            el.style.color = '#000';
        } else {

        }
        el.focus();
        el.select();
    } else {
        if (el.value == 'enter your email') {
            el.style.color = '#888';
        } else if (el.value == '') {
            el.value = 'enter your email';
            el.style.color = '#888';
        }
    }
}