function externalLinks() { 
	if (!document.links) return; 
		var pattern = new RegExp("(^| )external( |$)"); 
		var links = document.links; 
		for (var i = 0; i < links.length; i++) { 
		var link = links; 
		if (link.getAttribute("href") && pattern.test(link.getAttribute("rel"))) 
			link.target = "_blank"; 
		} 
	} 
window.onload = externalLinks;