text: const menuBtn = document.querySelector('.menu-btn');
  const menuList = document.querySelector('.burger-menu');
  let menuOpen = false;    
  menuBtn.addEventListener('click', () => {
          if(!menuOpen) {
              menuBtn.classList.add('open');
              menuList.classList.add('open');
              menuOpen = true;
          } else {
              menuBtn.classList.remove('open');
              menuList.classList.remove('open');
              menuOpen = false;
          }
      });
  
      function checkForm(form)
      { 
        // regular expression to match only alphanumeric characters and spaces
        var re = /^[\w ]+$/;
    
        // validation fails if the input doesn't match our regular expression
        if((!re.test(form.name.value)) || (!re.test(form.subject.value)) || (!re.test(form.message.value))){
          alert("Error: Input contains invalid characters!");
          form.message.focus();
          return false;
        }
    
        // validation was successful
        //alert("Error: Everything is fine!");
        return true;
      }
  
      function noWebShop(){
        alert("Our web shop is still under construction and will be available soon.");
      }
  