小程序倒计时

function leftTimer(year,month,day,hour,minute,second){

  var leftTime = (new Date(year,month-1,day,hour,minute,second)) - (new Date()); //计算剩余的毫秒数

  var days = parseInt(leftTime / 1000 / 60 / 60 / 24 , 10); //计算剩余的天数

  var hours = parseInt(leftTime / 1000 / 60 / 60 % 24 , 10); //计算剩余的小时

  var minutes = parseInt(leftTime / 1000 / 60 % 60, 10);//计算剩余的分钟

  var seconds = parseInt(leftTime / 1000 % 60, 10);//计算剩余的秒数

  days = checkTime(days);

  hours = checkTime(hours);

  minutes = checkTime(minutes);

  seconds = checkTime(seconds);

  setInterval("leftTimer(2016,11,11,11,11,11)",1000);

  document.getElementById("timer").innerHTML = days+"天" + hours+"小时" + minutes+"分"+seconds+"秒"; 

}

function checkTime(i){ //将0-9的数字前面加上0，例1变为01

  if(i<10)

  {

    i = "0" + i;

  }

  return i;

}