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"; 
     anchor.title = anchor.title + " (External Site - Opens in a new window)"
     }
 } 
}