function CountDown() { var count = 4, tmID,infobox = document.getElementById("start"),seiko = document.getElementById("atari"),kekka = document.getElementById("info"); function countDown() { if (--count == 0) { kekka.innerHTML = "ぼかーん"; } else { kekka.innerHTML = count + "秒前"; tmID = setTimeout(countDown, 1000); } } function startCountDown() { tmID = setTimeout(countDown, 1000); infobox.removeEventListener("click", startCountDown, false); seiko.addEventListener("click", stopCountDown, false); } function stopCountDown() { clearTimeout(tmID); seiko.innerHTML = "正解!よくわかったね"; seiko.removeEventListener("click", stopCountDown, false); } infobox.addEventListener("click", startCountDown, false); }; document.addEventListener("DOMContentLoaded", CountDown, false);