afflinks = function() {
	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") != null && 
            anchor.getAttribute("rel").indexOf("external") >= 0) {
            anchor.target = "_blank";
        }
	}
}
if (window.addEventListener) {
        window.addEventListener("load", afflinks, false);
}
else if (window.attachEvent) {
        window.attachEvent("onload", afflinks);
}