// Javascript code from J. Edwards, The Javascript Anthology, Sitepoint
document.onclick = function(e) {

var target = e ? e.target : window.event.srcElement;
while (target && !/^(a|body)$/i.test(target.nodeName)) {
	target = target.parentNode;
}

if (target && target.getAttribute('rel') && target.rel == 'external') {

	var external = window.open(target.href);
	return external.closed;
}

}