function rel2target() {
	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.getAttribute("rel") == "external nofollow")){
			anchor.target = "_blank";
		}
	}
}