var slideIndex = 1;
showSlides(slideIndex);
function plusSlide() {
showSlides(slideIndex += 1);
}
function minusSlide() {
showSlides(slideIndex -= 1);
}
function currentSlide(n) {
showSlides(slideIndex = n);
}
var interval_slides = setInterval(plusSlide,9000);
var tovar = 0;
function showSlides(element_id) {
var element = document.getElementById('id');
var slides = document.getElementsByClassName("item");
var dots = document.getElementsByClassName("slider-dots_item");
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";
}