<script type="text/javascript">
function showTime(){
nowtime=new Date();
year=nowtime.getFullYear();
month=nowtime.getMonth()+1;
date=nowtime.getDate();
document.getElementById("mytime").innerText=year+"年"+month+"月"+date+" "+nowtime.toLocaleTimeString();
}
setInterval("showTime()",1000);//定時 執行 showTime 方法 每1000毫秒執行一次
</script>
<body> <span id="mytime"></span>