function sayHello()
{
  mydate = new Date();
  myyear = mydate.getYear();
  if(myyear < 300) myyear = 1900 + myyear ;
  mymonth = mydate.getMonth()+1;
  today = mydate.getDate();
  myhour = mydate.getHours();
  if(myhour<6)            
    welcomestring="凌晨好";
  else if(myhour<9)
    welcomestring="早上好";
  else if(myhour<12)
    welcomestring="上午好";
  else if(myhour<14)
    welcomestring="中午好";
  else if(myhour<17)
    welcomestring="下午好";
  else if(myhour<19)
    welcomestring="傍晚好";
  else if(myhour<22)
    welcomestring="晚上好";
  else
    welcomestring="早点休息吧";
  document.write("<font color='#ffffff'>"+" "+welcomestring+"！"+"</font>");
}





function showDay()
{
  var enable=0;                                    
  var day;                                    
  var date;  
  var time_start = new Date();                                    
  var clock_start = time_start.getTime();                                    

  today=new Date();                                    

  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";                                    

  date=(today.getYear())+"年"+(today.getMonth()+1)+"月"+today.getDate()+"日 "; 
  document.write("<font color='#ffffff'>今天是"+date+day+"</font>");

}