
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<span></span>
</body>
<script>
var sp = document.getElementsByTagName("span")[0]
setInterval(function() {
var dqsj = new Date()
var jssj = new Date('2020/12/3 16:00:00')
var sysj = jssj - dqsj
var tian = parseInt(sysj / 1000 / 60 / 60 / 24)
var shi = parseInt(sysj / 1000 / 60 / 60 % 24)
var fen = parseInt(sysj / 1000 / 60 % 60)
var miao = parseInt(sysj / 1000 % 60)
console.log(miao)
sp.innerHTML = "距离12月12日下午4点还有" + tian + "天" + shi + "小时" + fen + "分钟" + miao + "秒"
}, 1000)
</script>
</html>