在页面找一个合适的位置添加div标签,用于显示时间
<div id="clock"><div>
自定义JavaScript函数 showTime()
<script language="javascript">
function showTime(clock){
var now=new Date();
var year=now.getFullYear();
var month=now.getMonth()+1;
var date=now.getDate();
var day=now.getDay();
var hour=now.getHours();
var min=now.getMinutes();
var sec=now.getSeconds();
var arrWeek=new Array("星期一","星期二","星期三","星期四","星期五","星期六","星期天");
var week=arrWeek[day];
var time=year+"年"+month+"月"+date+"日 "+week+" "+hour+":"+min+":"+sec;
clock.innerHTML="当前时间:"+time;
</script>
在页面载入事件中每隔一秒调用一次showTime()函数,实时显示系统时间
windows.onload=function(){
windows.setInterval("showTime(clock)",1000);
}