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;



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("rel")) {

         var rel = anchor.getAttribute("rel");

         var external = false;

         if (rel.indexOf(" ") > 0) {

            while (rel.indexOf(" ") > 0 && external == false) {

               if (rel.substr(0, rel.indexOf(" ")) == "external") {

                  external = true;

               }

               rel = rel.substr(rel.indexOf(" ") + 1, rel.length - rel.indexOf(" ") + 1);

            }

         }

         if (rel == "external") {

            external = true;

         }

         if (anchor.getAttribute("href") && external == true) {

            anchor.target = "_blank";

         }

      }

   }

   return;

}