Twitter Cleanup Greasemonkey Script

// ==UserScript==
// @name           Twitter Cleanup
// @namespace      BradlyFeeley
// @description    Clean up Twitter's "promotion" area and trending topics
// @include        http://twitter.com*
// @include        http://www.twitter.com*
// @include        https://twitter.com*
// @include        https://www.twitter.com*
// ==/UserScript==

var p_tags = document.getElementsByTagName("p");

for( i = 0; i < p_tags.length; i++ ) {
  if( p_tags[i].className.match("promotion") == 'promotion') {
    p_tags[i].style.display = "none";
  }
}

document.getElementById('trends').style.display        = "none";
document.getElementById('primary_nav').style.marginTop = "15px";