function externalLinks() { 
   function open_new_handler(url) {
   	return function() { 
   		window.open(url, "any", "");
   		return false;
   	}	
   }

	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.onclick=anchor.onkeypress=open_new_handler(anchor.href);
	}
}