//Javascript
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;