function main() {
    $('.dropdown-toggle').click(toggleDropdown);
    $('.arrow-next').click(nextSlide);
    $('.arrow-prev').click(prevSlide);
}

function toggleDropdown() {
    $('.dropdown-menu').toggle();
}

function nextSlide() {
    var currentSlide = $('.active-slide')
    var currentDot = $('.active-dot')
    var nextSlide = currentSlide.next();
    var nextDot = currentDot.next();
    if (nextSlide.length == 0) {
        nextSlide = $('.slide').first();
        nextDot = $('.dot').first()
    }
    currentSlide.fadeOut(600).removeClass('active-slide');
    currentDot.removeClass('active-dot');
    nextSlide.fadeIn(600).addClass('active-slide');
    nextDot.addClass('active-dot');
}

function prevSlide() {
    var currentSlide = $('.active-slide')
    var currentDot = $('.active-dot')
    var prevSlide = currentSlide.prev();
    var prevDot = currentDot.prev();
    if (prevSlide.length == 0) {
        prevSlide = $('.slide').last();
        prevDot = $('.dot').last()
    }
    currentSlide.fadeOut(600).removeClass('active-slide');
    currentDot.removeClass('active-dot');
    prevSlide.fadeIn(600).addClass('active-slide');
    prevDot.addClass('active-dot');
}

$(document).ready(main);