// ----- Click Tracker ---------------------------------------------------------

function clicktracker_domain(url)
{
  var reg   = new RegExp("^\\w+://((-|\\w)+(\\.(-|\\w)+)*)");
  var match = reg.exec(url);
  return match ? match[1] : "";
}

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

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

function clicktracker_track(url, title)
{
  var img = new Image();
  img.src = clicktracker_url+"?url="+url+"&title="+title;
}

function clicktracker(e)
{
  var ie  = navigator.appName == "Microsoft Internet Explorer";
  var src = ie ? window.event.srcElement : e.target;
  var tag = (src.tagName != "A") ? src.parentNode : src;

  if (!tag || tag.tagName != "A") return;

  domain    = clicktracker_domain   (tag.href);
  extension = clicktracker_extension(tag.href);

  if ( clicktracker_inarray(clicktracker_domains,    domain   ) &&
      !clicktracker_inarray(clicktracker_extensions, extension)) return;

  url   = escape(tag.href.substr(0, 150));
  title = (src.tagName == "A") ? src.innerHTML :
            (src.tagName == "IMG" && src.alt) ? src.alt : "Image";
  title = escape(title.substr(0, 150));

  setTimeout("clicktracker_track('"+url+"', '"+title+"')", 10);
  return;
}

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