!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>03_页面实时显示时间.html</title>
<style>
#colock{
width: 280px;
height: 80px;
border-radius: 10px;
margin: 0 auto;
text-align: center;
background-color: silver;
padding-top: 20px;
}
span{
font-size: 38px;
color: cyan;
}
</style>
</head>
<body>
<div id="colock">
<span></span>
<span>:</span>
<span></span>
<span>:</span>
<span></span>
</div>
</body>
</html>
<script>
var span=document.getElementsByTagName('span');
function time(){
var dt=new Date();
var h=dt.getHours();
var m=dt.getMinutes();
var s=dt.getSeconds();
span[0].innerHTML=(h<10) ? '0'+h :h;
span[2].innerHTML=(m<10) ? '0'+m :m;
span[4].innerHTML=(s<10) ? '0'+s :s;
}
time();
var timer=null;
timer=setInterval(fun,1000);
function fun(){
time();
}
</script>
代码结果如下: