function setExternalLinks() {
if (!document.getElementsByTagName) {
return null;
}
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.setAttribute("target", "blank");
}
}
}
window.onload = setExternalLinks;