setInterval(function() {

      $('.session-waiting-timestarted-ts').each(function(){
    tStart=$(this).html();
    console.log("time Started: "+tStart);
    tNow = Math.round(Date.now() / 1000);
    console.log("time now: "+tNow);
    tWaiting= tNow - tStart;
    console.log("time waiting: "+tWaiting);
    var hours =
    var minutes = Math.floor(tWaiting / 60);
    var seconds = tWaiting - minutes * 60;

    $(this).parent().children('.session-waiting-timestarted').html(minutes+":"+seconds);
    //alert(tWaiting);


});
}, 1000);