text: function openIcon(evt, iconName) {
      var i, container, tablinks; 
      container = document.getElementsByClassName("container");
      for (i = 0; i < container.length; i++) {
          container[i].style.display = "none";
      }
  
      tablinks = document.getElementsByClassName("tablinks");
      for (i = 0; i < tablinks.length; i++) {
          tablinks[i].className = tablinks [i].className.replace(" active", "");
      }
      document.getElementById(iconName).style.display = 'grid';
      evt.currentTarget.className += "active";
  }