function swlang() {
	var u = self.location.href;
	var nu;
	if ( u.indexOf('/de/') > -1 ) {
		nu = u.replace('/de/','/en/');
		}
	else if (u.indexOf('/en/') > -1) {
		nu = u.replace('/en/','/de/');
		}
	else {
		return;
		}
	self.location.href = nu;
	return;
	}