用flash做的倒计时器，界面漂亮，适合辩论赛等需要计时的场合用，包含fla和swf文件，通过修改fla可以实现修改时间。-Countdown to do with the flash device, the interface beautiful, suitable for debating competitions that require time to use the occasion, including fla, and swf files, fla can be achieved

实现辩论赛环节设置，倒计时设置，辩论时长设置(The debating timer implements the setting of the debate race, the countdown setting, and the length of the debate)