// JavaScript Document
function externalLinksBlank() { 
 if (!document.getElementsByTagName) return false; 
 var links = document.getElementsByTagName("a"); 
 if (links.length == 0) return false; 
 for (var i=0; i < links.length; i++) { 
   var relation = links[i].getAttribute("rel"); 
   if (relation == "external") 
      links[i].target = "_blank"; 
 } 
}