void send(String request)
	{
		// request : [USER], [ROOM]
		Message m=null;
		if(request.equals("[USER]"))
		{
			m=new Message(roomid,		//int roomid
				Msg.user,				//int msgtype
				"USERLIST",				//String room
				UserSetting.username,	//String sendUserName
				request,				//String msg
				""); 					//String remark
		}
		else if(request.equals("[ROOM]"))
		{
			m=new Message(roomid,		//int roomid
				Msg.user,				//int msgtype
				"ROOMLIST",				//String room
				UserSetting.username,	//String sendUserName
				request,				//String msg
				""); 					//String remark
		}				
		write(m);
	}