// ***** Aux *******************************************************************

// ***** clicktracker_inarray *****
function clicktracker_inarray(arr, val) {
  for (var i in arr) if (arr[i] == val) return true;
  return false;
}

// ***** clicktracker_innerText *****
function clicktracker_innerText(str) {
  str = str.replace(/<[^>]*>/g, ' ');
  str = str.replace(/&nbsp;/g,  ' ');
  str = str.replace(/^\s+/g, '');
  str = str.replace(/\s+$/g, '');
  str = str.replace(/^\s+/g, '');
  return str;
}

// ***** URL *******************************************************************
var clicktracker_re_scheme  = "^\\w+://";
var clicktracker_re_folder  = "((?:-|\\w|\\.)*)";
var clicktracker_re_domain  = clicktracker_re_scheme+       clicktracker_re_folder;
var clicktracker_re_folders = clicktracker_re_domain+"(?:/"+clicktracker_re_folder+')*';

// ***** clicktracker_domain *****
function clicktracker_domain(url) {
  var reg   = new RegExp(clicktracker_re_domain);
  var match = reg.exec(url);
  if (!match) return "";
  match = match[match.length-1];
  return match;
}

// ***** clicktracker_extension *****
function clicktracker_extension(url) {
  var reg   = new RegExp(clicktracker_re_folders);
  var match = reg.exec(url);
  if (!match) return "";
  match = match[match.length-1].split(".");
  return (match.length >= 2) ? match[match.length-1] : "";
}

// ***** Track *****************************************************************

// ***** clicktracker_aux *****
function clicktracker_aux(url, title, domain) {
  var img = new Image();
  img.src = clicktracker_url+"?url="+url+"&title="+title+"&domain="+domain+"&rand="+Math.random();
}

// ***** clicktracker *****
function clicktracker(e) {
  var ie  = navigator.appName == "Microsoft Internet Explorer";
  var src = ie ? window.event.srcElement : e.target;
  var tag = (src.tagName.toLowerCase() != "a") ? src.parentNode : src;
  if (!tag || tag.tagName.toLowerCase() != "a") return;
  domain    = clicktracker_domain   (tag.href);
  extension = clicktracker_extension(tag.href);
  if ( clicktracker_inarray(clicktracker_domains, domain) &&
      !clicktracker_inarray(clicktracker_extensions, extension)) return;
  var url   = tag.href;
  var title = '';
  if (!title) if (tag.tagName.toLowerCase() ==   "a") title = clicktracker_innerText(tag.innerHTML);
  if (!title) if (tag.tagName.toLowerCase() ==   "a") title = clicktracker_innerText(tag.title);
  if (!title) if (src.tagName.toLowerCase() == "img") title = clicktracker_innerText(src.alt);
  if (!title) if (src.tagName.toLowerCase() == "img") title = clicktracker_innerText("Image");
  url   = escape(url  .substr(0, 150));
  title = escape(title.substr(0, 150));
  if (url && title) setTimeout("clicktracker_aux('"+url+"', '"+title+"', '"+domain+"')", 10);
  return;
}

// ***** Attach Events *********************************************************
if (navigator.appName == "Microsoft Internet Explorer")
     document.attachEvent   ('onclick', clicktracker);
else document.addEventListener('click', clicktracker, false);