var running = false

var endTime = null

var timerID = null



function startTimer() {

  running = true

  now = new Date()

  now = now.getTime()

  // ostatni czynnik oznacza liczbę minut

  endTime = now + (1000 * 60 * 1)

  showCountDown()

}



function showCountDown() {

  var now = new Date()

  now = now.getTime()

  if (endTime - now <= 0) {

    stopTimer()

    alert("Czas upłynął, twój wynik to " + score)

    score=0

    doc.scoreform.score.value= "    0"

    startTimer()

  } else {

    var delta = new Date(endTime - now)

    var theMin = delta.getMinutes()

    var theSec = delta.getSeconds()

    var theTime = theMin

    theTime += ((theSec < 10) ? ":0" : ":") + theSec

    document.timeform.time.value = "    " + theTime

    if (running) {

      timerID = setTimeout("showCountDown()",1000)

    }

  }

}



function stopTimer() {

  clearTimeout(timerID)

  running = false

  document.timeform.time.value = "    0:00"

}