function externalLinks() 
{
  if (!document.getElementsByTagName) return;
  var anchors = document.getElementsByTagName("a");
  for (var i = 0; i < anchors.length; i++) 
  {
    var anchor = anchors[i];
    if (anchor.getAttribute("href") && anchor.getAttribute("rel")) 
    {
      var starget = anchor.getAttribute("rel");
      
      if (starget == 'external') starget = 'blank';
      if (starget != 'nofollow') {
			  anchor.target = "_" + starget;
      }
    }
  }
}

xAddEventListener(window, 'load', function() { externalLinks(); });