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("id")) 
     anchor.target = "page"; 
	else
	 anchor.target ="_blank";
 } 
}
window.onload = externalLinks;