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


window.onload = externalLinks;