text: var selects = document.getElementsByClassName('select');
  
  var combo = document.getElementsByClassName('combo');
  
  var tips = document.getElementsByClassName('tips');
  
  
  function toggleChildren(el){
      el.style.position = "relative";
      for (var i = 0; i < el.children.length; i++) {
          var child = el.children[i];
          child.style.display = (child.style.display == 'none' ? 'flex' : 'none');
      }
  }
  
  function toggleActive(el){
      var active = el.parentNode.getElementsByClassName('active');
      active[0].classList.remove('active');
      el.classList.toggle('active');
  }
  
  
  for (var i = 0; i < selects.length; i++) {
      var select = selects[i];
      
      for (var i = 0; i < select.children.length; i++) {
          var child = select.children[i];
          console.log(child);
          child.onclick = toggleActive(child);
          console.log(child);
      }
      select.onclick = toggleChildren(select);
      toggleChildren(select);
  }
  
  
  console.log("Loaded");