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();
document.getElementById('time').innerHTML = year + "年" + month + "月" + date + "日 " +  strDate +" " + hour + ":" + minute + ":" + second; //显示时间。
setTimeout("ShowTime();", 1000); //设定函数自动执行时间为1000ms(1s)。
}