function showtime(){
today=new Date();
document.write(
" ",
today.getYear(),"年",
today.getMonth()+1,"月",
today.getDate(),"日",
" " );
}
function weekday(){
var curr=new Date();
switch(curr.getDay()){
case 0:document.write("星期日");break;
case 1:document.write("星期一");break;
case 2:document.write("星期二");break;
case 3:document.write("星期三");break;
case 4:document.write("星期四");break;
case 5:document.write("星期五");break;
case 6:document.write("星期六");break;
}
}
function showgreeting(){
now = new Date(),hour = now.getHours()
if(hour < 1){document.write("深夜好!")}
else if (hour < 5){document.write("凌晨好!")}
else if (hour < 7){document.write("清晨好!")}
else if (hour < 11){document.write("上午好!")}
else if (hour < 13){document.write("中午好!")}
else if (hour < 17){document.write("下午好!")}
else if (hour < 19){document.write("傍晚好!")}
else if (hour <= 23){document.write("晚上好!")}
}