today=new Date();
 var day;
 var 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()+1900)+"年“+（today.getMonth()+1)+"月"+today.getDate()+"日“;
    document.write(date);
    document.write(" ");
    document.write(day);
写出上面语句时，为什么不能在页面显示出当前的时间？求帮助。。。。。