function reply(comment_id) {
  var container = document.getElementById("comment-"+comment_id);

  if (container.style.display == "none") {
    container.style.display = "block";
  }
  else if (container.style.display == "block") {
    container.style.display = "none";
  }
  
  focusInput(comment_id);
}

function focusInput(comment_id) {
  var elem = document.getElementById("form-"+comment_id);
  elem.focus();
}