<script type="text/javascript">
        var today = new Date();
        var number = today.getDate();
        var month = today.getMonth()+1;
        var  birthDay0 = [27,11,'Васи Пупкина'];//число, месяц
        var  birthDay1 = [28,11,'Димы Сидорова'];
        var  birthDays = [birthDay0, birthDay1];
        for (var i = 0; i <= (birthDays.length-1); i++)
            {
                if ((number == birthDays[i][0]) && (month == birthDays[i][1]))
                    {
                        document.write('Сегодня день рождения у '+ birthDays[i][2]);
                    }
            }
</script>