var slideIndex = 1;
                showSlides(slideIndex);

                function plusSlides(n) {
                    showSlides(slideIndex += n);
                }

                function currentSlide(n) {
                    showSlides(slideIndex = n);
                }

                function showSlides(n) {
                    var i;
                    var slides = document.getElementsByClassName("mySlides");
                    var dots = document.getElementsByClassName("dot");
                    if (n > slides.length) {
                        slideIndex = 1
                    }
                    if (n < 1) {
                        slideIndex = slides.length
                    }
                    for (i = 0; i < slides.length; i++) {
                        slides[i].style.display = "none";
                    }
                    for (i = 0; i < dots.length; i++) {
                        dots[i].className = dots[i].className.replace(" active", "");
                    }
                    slides[slideIndex - 1].style.display = "block";
                    dots[slideIndex - 1].className += " active";
                }