$(document).ready(function(){
    var timestamp = 0;
    if(!isNaN(parseInt($('.countdown.seconds .number').html()))) timestamp += parseInt($('.countdown.seconds .number').html());
    if(!isNaN(parseInt($('.countdown.minutes .number').html()) * 60)) timestamp += parseInt($('.countdown.minutes .number').html()) * 60;
    if(!isNaN(parseInt($('.countdown.hours .number').html()) * 3600)) timestamp += parseInt($('.countdown.hours .number').html()) * 3600;
    if(!isNaN(parseInt($('.countdown.days .number').html()) * 86400)) timestamp += parseInt($('.countdown.days .number').html()) * 86400;
    
    setInterval(function() {
        var time_remaining = timestamp;
        if(time_remaining % 86400 != time_remaining) {
            $('.countdown.days').css('display','inline');
            $('.countdown.days .number').html(''+Math.floor(time_remaining / 86400));
            time_remaining = time_remaining % 86400;
        }
        else {
            $('.countdown.days').css('display','none');
        }
        if(time_remaining % 3600 != time_remaining) {
            $('.countdown.hours').css('display','inline');
            $('.countdown.hours .number').html(''+Math.floor(time_remaining / 3600));
            time_remaining = time_remaining % 3600;
        }
        else {
            $('.countdown.hours').css('display','none');
        }
        if(time_remaining % 60 != time_remaining) {
            $('.countdown.minutes').css('display','inline');
            $('.countdown.minutes .number').html(''+Math.floor(time_remaining / 60));
            time_remaining = time_remaining % 60;
        }
        else {
            $('.countdown.minutes').css('display','none');
        }
        if(time_remaining > 0) {
            $('.countdown.seconds').css('display','inline');
            $('.countdown.seconds .number').html(''+time_remaining);
        }
        else {
            $('.countdown.seconds').css('display','none');
        }
        time_remaining = 0;
        timestamp--;
    } , 1000);
});