// JavaScript Document

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;