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";
 }
}
window.onload = externalLinks;

function popup(url)
{
	var newwindow;
	newwindow=window.open(url,'showinfo','height=600,width=720,scrollbars=1');
	if (window.focus) {newwindow.focus()}
}