set_control_title_from_name_bookmarklet.js

(function () {
  function setTitle(elements) {
    for (var i=0; i < elements.length; i++) {
      elements[i].title = elements[i].name;
    }
  }

  var elements = document.getElementsByTagName('input');
  setTitle(elements);
  elements = document.getElementsByTagName('select');
  setTitle(elements);
})();