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;