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倒計時小demo

window.addEventListener('load', function() { countTime(); }) function countTime() { var date = new Date(); var now = date.getTime(); var str = "2017/7/8 00:00:00"; //特別的日子 var endDate = new Date(str); var end = endDate.getTime(); var leftTime = now - end; var
d, h, m, s; if(leftTime >= 0) { d = Math.floor(leftTime / 1000 / 60 / 60 / 24); h = Math.floor(leftTime / 1000 / 60 / 60 % 24); m = Math.floor(leftTime / 1000 / 60 % 60); s = Math.floor(leftTime / 1000 % 60); } document.getElementById("_d").innerHTML = d + "天"
; document.getElementById("_h").innerHTML = h + "時"; document.getElementById("_m").innerHTML = m + "分"; document.getElementById("_s").innerHTML = s + "秒"; //遞迴每秒呼叫countTime方法,顯示動態時間效果 setTimeout(countTime, 1000); }