function externalLinks() {
	if (!document.getElementsByTagName)
		return;
	var anchors = document.getElementsByTagName("a");
	for ( var i = 0; i < anchors.length; i++) {
		var a = anchors[i];
		if (a.getAttribute("href")) {
			if (a.getAttribute("class") == "external"
					|| a.getAttribute("class") == "external_noicon")
				a.target = "_blank";
		}
	}
}
window.onload = externalLinks;