[z3r0]

Got it, it needs jquery (all my normal skins had it).

<vb:if condition="$show['member']">
<script src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script type="text/javascript">setInterval(function(){$.get(document.location.toString()).then(function(t){document.title=t.match(/<title>(.+)<\/title>/)[1]})},3e4),setTimeout(function(){$.get(document.location.toString()).then(function(t){document.title=t.match(/<title>(.+)<\/title>/)[1]})},1e3);</script>
</vb:if>