为什么我写的一个显示系统时间的小脚本不能在这里显示出来？
还有就是如何使用DOM的getelementbyid方法显示系统时间？
<SCRIPT LANGUAGE="JavaScript">
<!--
var timerID = null
var timerRunning = false
function showtime(){
var today,hour,second,minute,year,month,date;
var strDate ;
today=new Date();
var n_day = today.getDay();
switch (n_day)
{
case 0:{
strDate = "星期日"
}break;
case 1:{
strDate = "星期一"
}break;
case 2:{
strDate ="星期二"
}break;
case 3:{
strDate = "星期三"
}break;
case 4:{
strDate = "星期四"
}break;
case 5:{
strDate = "星期五"
}break;
case 6:{
strDate = "星期六"
}break;
case 7:{
strDate = "星期日"
}break;
}
year = today.getYear();
month = today.getMonth()+1;
date = today.getDate();
hour = today.getHours();
minute =today.getMinutes();
second = today.getSeconds();
if(month<10) month="0"+month;
if(date<10) date="0"+date;
if(hour<10) hour="0"+hour;
if(minute<10) minute="0"+minute;
if(second<10) second="0"+second;
timeValue =year + " 年 " + month + " 月 " + date + " 日 " + strDate +" " + hour + ":" + minute + ":" + second
document.GG.MM.value = timeValue
wuxingjia= setTimeout("showtime()",1000)
}
//-->
</SCRIPT>
</HEAD> <BODY onLoad="showtime()">
<FORM NAME="GG" onSubmit="0">
<INPUT TYPE="text" NAME="MM" SIZE=40 >
</FORM>