function create_another_button(elm) {

  var counter = parseInt(elm.getAttribute('data-counter'));

  var button = document.createElement('button');

  button.innerText = elm.id + '_' + counter;

  button.id = elm.id + '_' + counter;

  button.setAttribute('data-counter', '1');

  button.setAttribute('onclick','create_another_button(this)');

  document.body.appendChild(button);

  elm.setAttribute('data-counter', ++counter)

}