It's easy, just enter email to field and copy generated code to your HTML page.
<a id="m_s_443401"></a>
<script>
var fwkn = 'da' + 'rt' + '.w' + 'ei' + 'de' + 'r@' + 'de' + 'ad' + '.s' + 'ta' + 'r';
var sapu = document.getElementById('m_s_443401');
sapu.innerHTML = !(sapu.innerHTML) ? fwkn : sapu.innerHTML;
sapu.href = 'mailto:' + fwkn;
</script>
<span id="m_s_762751"></span>
<script>
var hdra = 'da' + 'rt' + '.w' + 'ei' + 'de' + 'r@' + 'de' + 'ad' + '.s' + 'ta' + 'r';
var ubdi = document.getElementById('m_s_762751');
ubdi.innerHTML = !(ubdi.innerHTML) ? hdra : ubdi.innerHTML;
</script>