倒计时时钟

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<div class="timenow"></div>

    function checktime(val) {                if (val < 10) {                    val = "0" + val;                }                return val            }            setInterval(function() {                var tm = new Date();                var xqj = "    今天是星期" + "日一二三四五六".charAt(new Date().getDay());                 var str = "" + tm.getFullYear() + "年";                str += (tm.getMonth() + 1) + "月";                str += tm.getDate() + "日";                str += checktime(tm.getHours()) + ':';                str += checktime(tm.getMinutes()) + ':';                str += checktime(tm.getSeconds())+xqj;                $(".timenow").text(str);            }, 1000);

js倒计时代码

<!doctype html><html>    <head>        <meta charset="utf-8">        <title>倒计时js代码</title>        <style>            * {                margin: 0;                padding: 0;            }            body {                font-size: 16px;                text-align: center;                font-family: arial;            }            .time {                margin-top: 10px;                border: 1px solid red;                height: 30px;                padding: 2px;                line-height: 30px;            }        </style>    </head>    <body>        <div class="time">            <span id="t_d">00天</span>            <span id="t_h">00时</span>            <span id="t_m">00分</span>            <span id="t_s">00秒</span>        </div>        <script>            setInterval(function() {                var EndTime = new Date('2017/04/05 00:00:00');                var NowTime = new Date();                var t = EndTime.getTime() - NowTime.getTime();                var d = 0;                var h = 0;                var m = 0;                var s = 0;                if (t >= 0) {                    d = Math.floor(t / 1000 / 60 / 60 / 24);                    h = Math.floor(t / 1000 / 60 / 60 % 24);                    m = Math.floor(t / 1000 / 60 % 60);                    s = Math.floor(t / 1000 % 60);                }                document.getElementById("t_d").innerHTML = d + "天";                document.getElementById("t_h").innerHTML = h + "时";                document.getElementById("t_m").innerHTML = m + "分";                document.getElementById("t_s").innerHTML = s + "秒";            }, 10);        </script>    </body></html>

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