jquery简单倒计时实现方法

var intDiff = parseInt(60); //倒计时总秒数量function timer(intDiff) {  window.setInterval(function () {    var day = 0,      hour = 0,      minute = 0,      second = 0; //时间默认值    if (intDiff > 0) {      day = Math.floor(intDiff / (60 * 60 * 24));      hour = Math.floor(intDiff / (60 * 60)) - (day * 24);      minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);      second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);    }    if (minute <= 9) minute = '0' + minute;    if (second <= 9) second = '0' + second;    $('#day_show').html(day + "天");    $('#hour_show').html('<s id="h"></s>' + hour + '时');    $('#minute_show').html('<s></s>' + minute + '分');    $('#second_show').html('<s></s>' + second + '秒');    intDiff--;  }, 1000);}$(function () {  timer(intDiff);});