// open external link in new tab/window

// use rel="external" instead of target="_blank"

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;