[Madzal]

(function(){
  var btn = document.querySelector(".gruppi-toggle");
  var block = document.querySelector(".speciali-gruppi-window");

  if (window.screen.width < 960){
 
  btn.addEventListener("click", function(){
 document.clicked = !document.clicked >>> 0;
  if(document.clicked) {
block.style.display = "block";
}}
else{
  block.style.display = "none";;
  })();