JS实现倒计时(时、分,秒)varinterval=1000;functionShowCountDown(year,month,day,divname){varnow=newDate();varendDate=newDate(year,month-1,day);varleftTime=endDate.getTime()-now.getTime();varleftsecond=parseInt(leftTime/1000);//varday1=parseInt(leftsecond/(24*60*60*6));varday1=Math.floor(leftsecond/(60*60*24));v