function openModal(m, s, c, d) {
  document.getElementById(m).style.display = "block";
  h_current_modal = m;
  h_current_slides = s;
  h_current_captions = c;
  h_current_dots = d;
}

function closeModal() {
  document.getElementById(h_current_modal).style.display = "none";
}

var slideIndex = 1;
var h_current_modal;
var h_current_slides;
var h_current_captions;
var h_current_dots;

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

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

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName(h_current_slides);
  var dots = document.getElementsByClassName(h_current_dots);
  var captionText = document.getElementById(h_current_captions);
  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";
  captionText.innerHTML = dots[slideIndex-1].alt;
}