l_correct();
}

/* function for checking radiogroups answers */
radiogroups_func = function(e) {
  console.log("webex: check radiogroups");

  var checked_button = document.querySelector('input[name=' + this.id + ']:checked');
  var cl = checked_button.parentElement.classList;
  var labels = checked_button.parentElement.parentElement.children;
  
  /* get rid of styles */
  for (i = 0; i < labels.length; i++) {
    labels[i].classList.remove("webex-incorrect");
    labels[i].classList.remove("webex-correct"