function external_links() {
	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.onclick = klick;
		anchor.title = (anchor.title != "") ? anchor.title+" [öffnet in neuem Fenster]" : anchor.getAttribute("href")+" [öffnet in neuem Fenster]";
		anchor.className = (anchor.className != '') ? anchor.className+' external' : 'external';
		}
	}
}

function klick () {
	window.open(this.href,'_blank');
	return false;
}

window.onload = function() {
  external_links();
}