displayTimeLeft.js

function displayTimeLeft (endDate) {
  var msUntilDate = endDate - (new Date).getTime();
    
  var secs = Math.floor(msUntilDate / 1000) // total seconds until end date
  , mins = Math.floor(secs / 60) // total minutes until end date
  , hours = Math.floor(mins / 60) // total hours until end date
  , days = Math.floor(hours / 24); // total days until end date
  
  secs = secs % 60; // seconds remaining after dividing by 60 -- for display in countdown
  mins = mins % 60; // minutes remaining after dividing by 60 -- for display in countdown
  hours = hours % 24; // hours remaining after dividing by 24 -- for display in countdown
  
  mins < 10 && (mins = "0" + mins);
  secs < 10 && (secs = "0" + secs);
  
  $("span.days").text(days);
  $("span.hours").text(hours);
  $("span.minutes").text(mins);
  $("span.seconds").text(secs);
}