function daojishi(){ ???????????var starttime = new Date("2017-09-30 01:06:11"); ???????????//date的格式也可以写成："2017/09/30 01:06:11" ????????????//其他格式还没试过 ?setInterval(function () { ???var nowtime = new Date(); ???var time = starttime - nowtime; ???var day = parseInt(time / 1000 / 60 / 60 / 24); ???var hour = parseInt(time / 1000 / 60 / 60 % 24); ???var minute = parseInt(time / 1000 / 60 % 60); ???var seconds = parseInt(time / 1000 % 60); ???if (day<0 || hour<0 || minute<0 || seconds<0) { ???day =0; ???hour =0; ???minute =0; ???seconds =0; ???} ???$(".day").html(day); ???$(".hour").html(hour); ???$(".min").html(minute); ???$(".sec").html(seconds); ?}, 1000);} ???
jquery 倒计时效果
原文地址：http://www.cnblogs.com/lilelile/p/7602689.html