せつなくてまぶしくて

UTF-8 で。

// ==UserScript==
// @name           Twitter Append Setunakutemabushikute
// @namespace      http://d.hatena.ne/jp/send/
// @include        http://twitter.com/home
// ==/UserScript==
/**
 * Original Source: 
 * http://userscripts.org/scripts/show/9086
 */
(function() {
  var onclick_orig;

  var w = (typeof unsafeWindow == 'undefined') ? window : unsafeWindow;
  var submit = w.document.getElementsByClassName('update-button')[0];
  var onclick = function() {
	  document.getElementById('status').value += 'せつなくてまぶしくて';
	
	  submit.onclick = onclick_orig;
	  submit.click();
	  submit.onclick = onclick;
    
    return false;
  };
  
  onclick_orig = submit.onclick;
  submit.onclick = onclick;
})();