1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <meta name="viewport" content="width=device-width, initial-scale=1.0">
6 <meta http-equiv="X-UA-Compatible" content="ie=edge">
7 <title>倒计时</title>
8 <style>.time-item {
9 width: 450px;
10 height: 45px;
11 margin: 0 auto;
12 }
13
14 .time-item strong {
15 background: orange;
16 color: #fff;
17 line-height: 49px;
18 font-size: 36px;
19 font-family: Arial;
20 padding: 0 10px;
21 margin-right: 10px;
22 border-radius: 5px;
23 box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
24 }
25
26 .time-item > span {
27 float: left;
28 line-height: 49px;
29 color: orange;
30 font-size: 32px;
31 margin: 0 10px;
32 font-family: Arial, Helvetica, sans-serif;
33 }
34 .title {
35 width: 260px;
36 height: 50px;
37 margin:200px auto 50px auto;
38 }</style>
39 </head>
40 <body onload="leftTimer()">
41 <h1 class="title">距离光棍节，还有</h1>
42
43 <div class="time-item" >
44 <span><span id="day"></span>天</span>
45 <strong><span id="hour"></span>时</strong>
46 <strong><span id="minute"></span>分</strong>
47 <strong><span id="second"></span>秒</strong>
48 </div>
49 <script type="text/javascript">
50 function leftTimer(year,month,day,hour,minute,second){
51
52 // 参数monthIndex 是从“0”开始计算的，这就意味着一月份为“0”，十二月份为“11”
53 //以一个函数的形式来调用 Date 对象（即不使用 new 操作符）会返回一个代表当前日期和时间的字符串。
54 var leftTime = (new Date(year,month-1,day,hour,minute,second)) - (new Date()); //计算剩余的毫秒数
55
56 //parseInt解析一个字符串，返回整数
57 var days = parseInt(leftTime / 1000 / 60 / 60 / 24 , 10);
58 var hours = parseInt(leftTime / 1000 / 60 / 60 % 24 , 10);
59 var minutes = parseInt(leftTime / 1000 / 60 % 60, 10);
60 var seconds = parseInt(leftTime / 1000 % 60, 10);
61
62 //不足10的前面加上0
63 days = checkTime(days);
64 hours = checkTime(hours);
65 minutes = checkTime(minutes);
66 seconds = checkTime(seconds);
67
68 // 设置计时器
69 setInterval("leftTimer(2019,11,11,11,11,11)",1000);
70
71 //将时间加到文中
72 document.getElementById('day').innerHTML = days;
73 document.getElementById('hour').innerHTML = hours;
74 document.getElementById('minute').innerHTML = minutes;
75 document.getElementById('second').innerHTML = seconds;
76 }
77 function checkTime(i){ //将0-9的数字前面加上0
78 if(i<10)
79 {
80 i = "0" + i;
81 }
82 return i;
83 }
84
85 </script>
86 </body>
87 </html>
