setTimeout(function () {
  var hint = document.getElementById('hint');
  var hint_icon = document.getElementById('hint_icon');
  hint_icon.onclick = function () {
    if(hint.className.indexOf('show') < 0) {
      hint.className = hint.className + " show";
    }
    else {
      hint.className = hint.className.replace(/\sshow/, '');
    }
  }
}, 50);