// https://www.w3schools.com/howto/howto_js_slideshow.asp

var slideIndex = 1;
showSlides(slideIndex);

// Next/previous controls
function plusSlides(n) {
  showSlides(slideIndex += n);
}

// Thumbnail image controls
function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
	var i;
	var slides = document.getElementsByClassName("slide");
	var dots = document.getElementsByClassName("slide-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(" slide-active", "");
	}
	slides[slideIndex-1].style.display = "block";
	dots[slideIndex-1].className += " slide-active";
}