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";
 			}
}
window.onload = externalLinks;