var czasy = [43,];
        var dalej = false;
        var secs;
        var timerID = null;
        var timerRunning = false;
        var delay = 1000;
        var obecnie = 0;
        var cwicz = 0;
        var typy = new Array();

        function InitializeTimer(s)
        {
            // Set the length of the timer, in seconds
            $('#btnDalej').attr('disabled', 'disabled');
            secs = s;
            StopTheClock();
            StartTheTimer();
        }

        function StopTheClock()
        {
            if(timerRunning)
            {
                clearTimeout(timerID);
            }
            timerRunning = false;
        }

        function StartTheTimer()
        {
            if (secs == 0)
            {
                StopTheClock();
                $('#btnDalej').removeAttr('disabled');
            }
            else
            {
                self.status = secs;
                secs = secs - 1;
                timerRunning = true;
                timerID = self.setTimeout("StartTheTimer()", delay);
            }
        }

    </script>