Make all forms to allow autocomplete + make all textarea resize possible

autocomplete-textearea.js

// ==UserScript==
// @name        Autocomplete + textarea resize enabled
// @namespace   http://?
// @description Make all forms to allow autocomplete + make all textarea resize possible
// @author		Timo
// @license		?
// @include     *
// @version     1
// @homepage	http://?
// @grant       none
// ==/UserScript==

var frm = document.getElementsByTagName('form');
for (var i = 0, n = frm.length; i < n; i++) {
  frm[i].setAttribute('autocomplete', 'on');
}
var inp = document.getElementsByTagName('input');
for (var i = 0, n = inp.length; i < n; i++) {
  if (inp[i].getAttribute('autocomplete') == 'off') {
    inp[i].setAttribute('autocomplete', 'on');
  }
}

var txtarea = document.getElementsByTagName('textarea');
for (var i = 0, n = txtarea.length; i < n; i++) {
  if (txtarea[i].style.resize == 'none') {
    txtarea[i].style.resize = 'both';
  }
  if (txtarea[i].getAttribute('spellcheck') == false) {
    txtarea[i].setAttribute('spellcheck', true);
  }
}