小巧實用js倒計時

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<script type="text/javascript">    var intDiff = parseInt(15); //倒計時總秒數量    function timer(intDiff) {        index = window.setInterval(function () {            var day = 0,        hour = 0,        minute = 0,        second = 0; //時間預設值                    if (intDiff > 0) {                day = Math.floor(intDiff / (60 * 60 * 24));                hour = Math.floor(intDiff / (60 * 60)) - (day * 24);                minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);                second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);            }            if (minute <= 9) minute = ‘0‘ + minute;            if (second <= 9) second = ‘0‘ + second;            $(‘#day_show‘).html(day + "天");            $(‘#hour_show‘).html(‘<s id="h"></s>‘ + hour + ‘時‘);            $(‘#minute_show‘).html(‘<s></s>‘ + minute + ‘分‘);            $(‘#second_show‘).html(‘<s></s>‘ + second + ‘秒‘);            intDiff--;             if (day == 0 && hour == 0 && minute == 0 && second == 0) {                clearInterval(index);            }           }, 1000);    }    $(function () {        timer(intDiff);    });    </script> html <h1>網頁上的倒計時</h1><div class="time-item">    <span id="day_show">0天</span>    <strong id="hour_show">0時</strong>    <strong id="minute_show">0分</strong>    <strong id="second_show">0秒</strong></div> css      <style>        h1 {    font-family:"微軟雅黑";    font-size:40px;    margin:20px 0;    border-bottom:solid 1px #ccc;    padding-bottom:20px;    letter-spacing:2px;}.time-item strong {    background:#C71C60;    color:#fff;    line-height:49px;    font-size:36px;    font-family:Arial;    padding:0 10px;    margin-right:10px;    border-radius:5px;    box-shadow:1px 1px 3px rgba(0,0,0,0.2);}#day_show {    float:left;    line-height:49px;    color:#c71c60;    font-size:32px;    margin:0 10px;    font-family:Arial,Helvetica,sans-serif;}.item-title .unit {    background:none;    line-height:49px;    font-size:24px;    padding:0 10px;    float:left;}    </style>

小巧實用js倒計時