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var times = 120 * 100; // 120秒
countTime = setInterval(function() {
times = --times < 0 ? 0 : times;
var mi = Math.floor(times / 100 /60%60 ).toString();
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mi = "0" + mi;
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var ms = Math.floor(times / 100 % 60).toString();
if(ms.length <= 1) {
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// 获取分钟、毫秒数
$(".a").html(mi);
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