function FixExternalLinks() {
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") && anchor.getAttribute("rel") == "external") {
    anchor.target = "_blank";
  }
}
}