js显示动态时间

function time(){ //在页面加载时调用该函数 onload="time();"
var timer=new Date();
var year=timer.getFullYear();
var month=timer.getMonth();
                var date=timer.getDate();
var day=timer.getDay();
                var week='';
switch(day){
case 1:week='星期一';break;
case 2:week='星期二';break;
case 3:week='星期三';break;
case 4:week='星期四';break;
case 5:week='星期五';break;
case 6:week='星期六';break;
default:week='星期日'
}
var hours=timer.getHours();
var minutes=timer.getMinutes();
var seconds=timer.getSeconds();
if (minutes<=9) minutes="0"+minutes;
if (seconds<=9) seconds="0"+seconds;
//这里修改时间的文字样式
var myclock="<font size='4' face='Arial' color=blue>"+year+"."+month+"."+date+"<br>"+week+"<br>"+hours+":"+minutes+":"+seconds+"</b></font>";

document.getElementById('myclock').innerHTML=myclock;
setTimeout("time()",1000); //设置1秒执行一次Time()函数
}