9-0重复倒数

var endTime = new Date(2017,10,18).getTime() //假设为结束日期

,serverTime = new Date().getTime();

var times = endTime-serverTime; // 60秒

countTime = setInterval(function() {

times = --times < 0 ? 0 : times;

var hm = Math.floor(times % 10).toString();

if(hm.length <= 1) {

hm = "0" + hm;

}

if(times == 0) {

alert("活动结束");

clearInterval(countTime);

}

// 获取分钟、毫秒数

$("#HM").text(hm)

}, 100);