function showdate(){
today=new Date()
year=today.getFullYear()
month=today.getMonth()+1
day=today.getDate()
week=today.getDay()
switch(week){
case 0:week1="星期日";break
case 1:week1="星期一";break
case 2:week1="星期二";break
case 3:week1="星期三";break
case 4:week1="星期四";break
case 5:week1="星期五";break
case 6:week1="星期六";break
}
document.write(year+"年"+month+"月"+day+"日"+" "+week1)
}