// ==UserScript==
// @name Add Subscription
// @author Martin Jonáš  <info@matajon.net>
// @include http://forum.thesims2.cz/posting.php?mode=reply*
// @include http://forum.thesims2.cz/posting.php?mode=newtopic*
// @include http://forum.thesims2.cz/posting.php?mode=quote*
// ==/UserScript==
window.addEventListener('DOMContentLoaded', function() 
{
  var textArea = document.getElementsByTagName('textarea')[0];
  var position = 0;
  if (textArea.value.length > 0)
  {
    position = textArea.value.length + 2;
  }
  
  var podpis = "\n\n____________\n Podpis :)";
  
  textArea.value += podpis;
  textArea.focus();
  textArea.setSelectionRange(position, position);
}, false);