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

function areYouSure(url,form_id) {
	if (confirm('Are you sure you want to do that?')) {
		if (!form_id) {
			document.location.href=url;
		} else {
			document.getElementById(form_id).submit();
		}
	}
}