<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>更新</title>
</head>
<body>
<div id='timeShow'></div>
</body>
<script>
var t = null;
function time(){
dt = new Date();
var y = dt.getFullYear();
var h = dt.getHours();
var m = dt.getMinutes();
var s = dt.getSeconds();
document.getElementById("timeShow").innerHTML="当前时间："+y+"年"+h+"时"+m+"分"+s+"秒";
t = setTimeout(time,1000);
}
window.onload=function(){time()}
</script>
</html>