function openWin(url, opt) {
  window.open(url,'',opt);
}

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")) {
         if (anchor.getAttribute("rel") == "external") {
            anchor.target = "_blank";
         } else if (anchor.getAttribute("rel")) {
            anchor.target = anchor.getAttribute("rel");
         }
      }
   }
}
window.onload = externalLinks;