jQuery.fn.countdown = function (date, settings) {
    var countdown_settings = {
        lang: {
            years:   ['год', 'года', 'лет'],
            months:  ['месяц', 'месяца', 'месяцев'],
            days:    ['день', 'дня', 'дней'],
            hours:   ['час', 'часа', 'часов'],
            minutes: ['минута', 'минуты', 'минут'],
            seconds: ['секунда', 'секунды', 'секунд'],
            plurar:  function(n) {
                return (n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
            }
        }, 
        prefix: "Осталось: ", 
        finish: "Всё"            
    }; 
    countdown_settings = jQuery.extend(countdown_settings, settings);
 
    var timeDifference = function(begin, end) {
        if (end < begin) {
            return false;
        }
        var
        days   = end.getDate()  - begin.getDate(),
        months = end.getMonth() - begin.getMonth(),
        years  = end.getYear()  - begin.getYear(),
        hms    = (end / 1000 - begin / 1000) % 86400,
        seconds = Math.floor(hms % 60),
        minutes = Math.floor(hms/60) % 60,
        hours   = Math.floor(hms/3600) % 60,
        date = new Date();
        if (days < 0) {
            date.setFullYear(begin.getYear(), begin.getMonth(), 32);
            days += 31 - date.getDate();
            months--;
        }
        if (months < 0) {
            months += 12;
            years--;
        }
        var diff = {years: years, months: months, days: days, hours: hours, minutes: minutes, seconds: seconds};
        var result = new Array();
        for (i in diff) {
            if(!diff[i]) continue;
            result.push(diff[i] + ' ' + countdown_settings.lang[i][countdown_settings.lang.plurar(diff[i])]);
        }
        return result.join(' ');
    };
    var elem = $(this);
    var timeUpdate = function () {
        var s = timeDifference(new Date(), date);
        if (s.length) {
            elem.html(countdown_settings.prefix + s);
        } else {
            clearInterval(timer);
            elem.html(countdown_settings.finish);
        }        
    };
    timeUpdate();
    var timer = setInterval(timeUpdate, 1000);        
};