function mailDecode(name, domain, endung, betreff) {
	if (betreff != null)
		document.write('<a href="' + 'mailto:' + name + '@' + domain + '.' + endung + '?subject=' + betreff + '">' + name + '@' + domain + '.' + endung + '</a>');
	else
		document.write(name + '@' + domain + '.' + endung);
}