Forum PHP.pl

<script>
    var timeServer = {
        year: <?=date('Y');?>
        ,month: <?=date('m');?>
        ,day: <?=date('d');?>
        ,hour: <?=date('H');?>
        ,minute: <?=date('i');?>
        ,second: <?=date('s');?>
    }
    ,interval
    ,paused
    ,changeTime = function(i)
    {
        i = i || 1;

        now.setSeconds(now.getSeconds() + i);

        console.log(now);
    }
    ,now = new Date(timeServer['year'], timeServer['month'], timeServer['day'], timeServer['hour'], timeServer['minute'] ,timeServer['second'], 00); //aktualny czas pobrany z serwera


    interval = setInterval(changeTime, 1000);

    document.addEventListener('visibilitychange', function()
    {

        if(document.hidden)
        {
            clearInterval(interval);
            paused = Date.now();
        }
        else
        {
            changeTime(Math.floor((Date.now() - paused) / 1000));

            interval = setInterval(changeTime, 1000);
        }

        console.log('visibilitychange', now);
    }, false);
</script>