function externalLinks() {
	if (document.getElementsByTagName) { 
		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"; 
		} 
	}
}