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<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
<script type="text/javascript">
//今天时间
window.setInterval(function() {
var nowDate = new Date()
//周一时间
var tomorrowDate = new Date("2021-12-22 08:00:00")
var secStr = nowDate.getTime()
var secStr = tomorrowDate.getTime()
var sss = tomorrowDate - nowDate;
var sec = Math.floor(sss / 1000 % 60);
var min = Math.floor(sss / 1000 / 60 % 60);
var hour = Math.floor(sss / 1000 / 60 / 60 % 24);
var day = Math.floor(sss / 1000 / 60 / 60 / 24 % 24);
var yue =Math.floor(sss/1000/60/60/24)
sec = sec < 10 ? "0" + sec : sec;
min = min < 10 ? "0" + min : min;
hour = hour < 10 ? "0" + hour : hour;
day = day < 10 ? "0" + day : day;
// document.write(day);
// document.write(hour),
// document.write(min);
// document.write(sec);
var shijian = "距离上课还有" + day + "天" + hour + "时" + min + "分" + sec + "秒"
document.body.innerHTML = shijian;
// document.write(shijian)
})
</script>
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