[grease monkey help needed] VK links tracking gone

// VKontakte click tracking gone
// version 0.1
// Release Date: 11-11-11
//
// ===== INSTRUCTIONS =====
//
// This is a Greasemonkey user script.
//
// To use this script, get Greasemonkey: http://greasemonkey.mozdev.org/
// After you've installed it, come back to this page. A dialog box will
// appear asking you if you want to install this script.
//
// To uninstall, go to Tools->Greasemonkey->Manage User Scripts, select
// "VKontakte click tracking gone" from the list on the left, and click
// Uninstall.
//
// ==UserScript==
// @name           VKontakte click tracking gone
// @namespace      http://sbdev.org
// @description    Removes click tracking from VK web sites
//
// @include        http://vkontakte.ru/*
// @include        http://vk.com/*
// ==/UserScript==

// doIt();

document.addEventListener('DOMAttrModified', function (event) {
    doIt();
}, false);

document.addEventListener('DOMNodeInserted', function (event) {
    doIt();
}, false);

function doIt() {
  resultLinks = $x("//a");
  resultLinks.forEach(function(link) {  // loop over links
    var oldLink = link.href;
    if (/^http:\/\/vk.com/.test(oldLink) || /^http:\/\/vkontakte.ru/.test(oldLink)) {
      var matches = /away.php\?(to)=(.+?)&/.exec(oldLink);
      if (matches != null) {
        link.href = unescape(matches[2]);
      }
    }
  });
}

// XPath helper, from
// http://wiki.greasespot.net/Code_snippets
function $x() {
  var x='',          // default values
      node=document,
      type=0,
      fix=true,
      i=0,
      toAr=function(xp){      // XPathResult to array
	var final=[], next;
	while(next=xp.iterateNext())
	  final.push(next);
	return final
      },
      cur;
  while (cur=arguments[i++])      // argument handler
    switch(typeof cur) {
      case "string":x+=(x=='') ? cur : " | " + cur;continue;
      case "number":type=cur;continue;
      case "object":node=cur;continue;
      case "boolean":fix=cur;continue;
    }
  if (fix) {      // array conversion logic
    if (type==6) type=4;
    if (type==7) type=5;
  }
  if (!/^\//.test(x)) x="//"+x;            // selection mistake helper
    if (node!=document && !/^\./.test(x)) x="."+x;  // context mistake helper
  var temp=document.evaluate(x,node,null,type,null); //evaluate!
  if (fix)
    switch(type) {                              // automatically return special type
      case 1:return temp.numberValue;
      case 2:return temp.stringValue;
      case 3:return temp.booleanValue;
      case 8:return temp.singleNodeValue;
      case 9:return temp.singleNodeValue;
    }
  return fix ? toAr(temp) : temp;
}