date制作电子时钟

var time = new Date();
var year = time.getFullYear();
var month = time.getMonth()+1;
var day = time.getDate();
var week = time.getDay();
var hour = time.getHours();
var minute  = time.getMinutes();
var second  = time.getSeconds();
var flag = 'AM';
switch(week){
case 1:week = "一"; break;
case 2:week = "二"; break;
case 3:week = "三"; break;
case 4:week = "四"; break;
case 5:week = "五"; break;
case 6:week = "六"; break;
default: week = "日";break;
}
if(hour<10){
hour = "0" + hour;

}
if(hour>12){
flag = "PM";
}
if(minute<10){
minute = "0" + minute;
}
if(second<10){
second = "0" + second;
}
var result = year+"年 "+month+"月 "+day+"日  星期"+week+" "+hour+":"+minute+":"+second + " "+flag;
document.write(result);