<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="box">现在是2019年07月02号 星期二 08时03分07秒</div>
<script>
function change() {
var date = new Date();
var year = date.getFullYear();
var month = date.getMonth(); //0-11
var da = date.getDate();
var week = date.getDay(); // 0-6
var hour = date.getHours();
var min = date.getMinutes();
var sec = date.getSeconds();
/* var weekStr = '';
switch (week) {
case 0: weekStr = '天'; break;
case 1: weekStr = '一'; break;
case 2: weekStr = '二'; break;
case 3: weekStr = '三'; break;
case 4: weekStr = '四'; break;
case 5: weekStr = '五'; break;
case 6: weekStr = '六'; break;
} */
var weekAry = ['天', '一', '二', '三', '四', '五', '六'];
var str = '现在是' + year + '年' + addZero(month + 1) + '月' + addZero(da)
+ '号 星期' + weekAry[week] + ' ' + addZero(hour) + '时' + addZero(min) + '分' + addZero(sec) + '秒';
var oBox = document.getElementById('box');
oBox.innerHTML = str;
}
change();
setInterval(function () {
change();
}, 1000);
function addZero(a) {
return a < 10 ? '0' + a : a;
}
</script>
</body>
</html>