function externalLinks() {
	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.target = "_blank";
	}
	var areamaps = document.getElementsByTagName("area");
	for (var i=0; i<areamaps.length; i++) {
		var areamap = areamaps[i];
		if (areamap.getAttribute("href") && areamap.getAttribute("class") == "external")
			areamap.target = "_blank";
	}
}
window.onload = externalLinks;