topPage in ons-tab structure

alpl

Greetings,
how to know the active/displayed ons-page ?

with simple pages its easy. -> navigator.topPage

But with ons-tab structure, topPage is “myid” instead of the actual id of (active) mypage_1

thanks in advance for some ideas.

<ons-page id="myid">
   <ons-tabbar...
      <ons-tab active page="mypage_1.html"... 
      <ons-tab        page="mypage_2.html"...