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;