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";
		anchor.title="opens in  new window";
	 }
 }
}
//window.onload = externalLinks;