anchor.diff:  }
   
   void Modeshift(MouseEvent event){               ///转换到标签模式
  -  timeortag=false;
  -  DivElement tagtime=querySelector('#Tagtime');
  -  tagtime.classes
  -    ..clear()
  -    ..add('Tagtime1');
  -  DivElement tagtag=querySelector('#Tagtag');
  -  tagtag.classes
  -    ..clear()
  -    ..add('Tagtag');
  -  querySelector('#Tagtime').onClick.listen(Modeshift1);
     var path = 'http://127.0.0.1:8008/showmes';
     var httpRequest = new HttpRequest();
     httpRequest
       ..open('POST', path)
       ..send(JSON.encode(chooseclassCourse))
       ..onLoadEnd.listen((e) => requestMesComplete(httpRequest));
  -}
  -
  -void Modeshift1(MouseEvent event){              ///转换到时间轴
  -  timeortag=true;
  +
  +  timeortag=false;
     DivElement tagtime=querySelector('#Tagtime');
     tagtime.classes
       ..clear()
  -    ..add('Tagtime');
  +    ..add('Tagtime1');
     DivElement tagtag=querySelector('#Tagtag');
     tagtag.classes
       ..clear()
  -    ..add('Tagtag1');
  -  querySelector('#Tagtag').onClick.listen(Modeshift);
  +    ..add('Tagtag');
  +  querySelector('#Tagtime').onClick.listen(Modeshift1);
  +
  +
  +}
  +
  +void Modeshift1(MouseEvent event){              ///转换到时间轴
     var path = 'http://127.0.0.1:8008/showmes';
     var httpRequest = new HttpRequest();
     httpRequest
       ..open('POST', path)
       ..send(JSON.encode(chooseclassCourse))
       ..onLoadEnd.listen((e) => requestMesComplete(httpRequest));
  +
  +  timeortag=true;
  +  DivElement tagtime=querySelector('#Tagtime');
  +  tagtime.classes
  +    ..clear()
  +    ..add('Tagtime');
  +  DivElement tagtag=querySelector('#Tagtag');
  +  tagtag.classes
  +    ..clear()
  +    ..add('Tagtag1');
  +  querySelector('#Tagtag').onClick.listen(Modeshift);
  +
   }
   
   void Loadsaymywords(){
  
positive.code:         String commenttext=comments[(j-1)*3+1];
          int zan=int.parse(comments[(j-1)*3+2]);
          Random random = new Random();
          var msgcolorID = random.nextInt(4);
          String msgcolor=colors[msgcolorID];
          Message msg=new Message(commenttext,zan,j,msgcolor,'Leftmain');
          //querySelector('#Myclassbt').text = '!';
  
negative.code:     List<String> comments = decoded;
      var a = decoded.length;
      commentcount = (a-1)/3;
      //commentcount = a-1.0;
      String theearliesttime=decoded[a-4];
  
      querySelector('#Stars').remove();
  