// open external link in new tab/window
// use rel="external" instead of target="_blank"

function externallink() {
	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";
			anchors[i].title += "(Opens in new tab/window)";
		}
	}
}
window.onload = externallink;