function przejdz_do(a, b)
    {
			var ae = document.getElementById('quiz_'+a);
			var be = document.getElementById('quiz_'+b);
			
			ae.style.display = 'none';
			be.style.display = 'block';
			return 0;
		}
		
		function quiz_start()
    {
			var ae = document.getElementById('quiz_0');
			
			ae.style.display = 'block';
		}
		
		function koniec_czasu()
		{
      var qaz = document.getElementById('czasm');
      qaz.submit();  
    }
    
    $(function(){
        
        $('#zegar').countdown({
          image: 'img/digits.png',
          startTime: '03.00',
          timerEnd: function(){ koniec_czasu(); },
          format: 'mm.ss'
        });
      });