today = new Date();
   hour = today.getHours()
   if(hour < 6)         hello="凌晨好!"
   else if (hour < 9)   hello="早上好!"
   else if (hour < 12)  hello="上午好!"
   else if (hour < 14)  hello="中午好!"
   else if (hour < 17)  hello="下午好!"
   else if (hour < 19)  hello="傍晚好!"
   else if (hour < 22)  hello="晚上好!"
   else                 hello="凌晨好!"

   if(today.getDay()==0)     day = "星期日"
   if(today.getDay()==1)     day = "星期一"
   if(today.getDay()==2)     day = "星期二"
   if(today.getDay()==3)     day = "星期三"
   if(today.getDay()==4)     day = "星期四"
   if(today.getDay()==5)     day = "星期五"
   if(today.getDay()==6)     day = "星期六"

   date1 = "<span style='font-size:12px;color:FFFFFF'>今天是" + (today.getYear())  + "年" + (today.getMonth() + 1 ) + "月" + today.getDate() + "日  " + "</span>";
   document.write("<span style='font-size:12px;color:FFFFFF'>" + hello + date1 + day + "</span>");