function from Lea Verou's version of Conway's Game Of Life

life.js

(function() {

  var buttons = {
    next: $('button.next')
  };

  buttons.next.addEventListener('click', function() {
    lifeView.next();
  });

  $('#autoplay').addEventListener('change', function() {
    buttons.next.disabled = this.checked;

    if(this.checked) {
      lifeView.autoplay = this.checked;
      lifeView.next();
    } else {
      clearTimeout(lifeView.timer);
    }
  });

})();