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.getFullYear();
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
$('#time').html(year + "年" + (month<=9?'0'+month:month)+ "月" +  (date<=9?'0'+date:date)+ "日 " +(strDate<=9?'0'+strDate:strDate) +" " +  (hour<=9?'0'+hour:hour)+ ":" +(minute<=9?'0'+minute:minute) + ":" + (second<=9?'0'+second:second));
setTimeout("showtime();", 1000); //设定函数自动执行时间为 1000 ms(1 s)
}