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"; 
				 } 
			}