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") == "external") anchor.target = "_blank"; 
    }
 } window.onload = externalLinks;