function externalLinks() 
	{ 
	if (!document.getElementsByTagName) return; 
	var anchors = document.getElementsByTagName("a"); 
	for (var i=0; i<anchors.length; i++) 
		{ 
		var anchor = anchors[i]; 
		var relvalue = anchor.getAttribute("rel");
		if (anchor.getAttribute("href")) 
			{
			var external = /external/;
			var relvalue = anchor.getAttribute("rel");
			if (external.test(relvalue)) 
				{ 
				anchor.target = "_blank"; 
				}
			} 
		}
	} 
window.onload = externalLinks;