function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
for (var i=0; i < anchors.length; i++) {
	if (anchors[i].getAttribute("href") &&

	anchors[i].getAttribute("rel") == "external") {
		anchors[i].target = "_blank";
	}
}
}
window.onload = externalLinks;