I am adding a countdown timer to a single CMS page that is counting down to September 20th, 2015.

I put all the javascript functions in js/countdownClock.js

function getTimeRemaining(endtime){
  var t = Date.parse(endtime) - Date.parse(new Date());
  var seconds = Math.floor( (t/1000) % 60 );
  var minutes = Math.floor( (t/1000/60) % 60 );
  var hours = Math.floor( (t/(1000*60*60)) % 24 );
  var days = Math.floor( t/(1000*60*60*24) );
  return {
    'total': t,
    'days': days,
    'hours': hours,
    'minutes': minutes,
    'seconds': seconds

function initializeClock(id, endtime){
  var clock = document.getElementById(id);
  var daysSpan = clock.querySelector('.days');
  var hoursSpan = clock.querySelector('.hours');
  var minutesSpan = clock.querySelector('.minutes');
  var secondsSpan = clock.querySelector('.seconds');

  function updateClock(){
    var t = getTimeRemaining(endtime);

    daysSpan.innerHTML = t.days;
    hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
    minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
    secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);


  var timeinterval = setInterval(updateClock,1000);

var deadline = 'September 20 2015 08:59:59 UTC+0800';
initializeClock('clockdiv', deadline);

Then I called the file in the CMS page under the Layout Update XML sections:

<reference name="head">
  <action method="addItem">

In the Content section of the page I put in:

<div id="clockdiv">
<div><span class="days">.</span>
<div class="smalltext">Days</div>
<div><span class="hours">.</span>
<div class="smalltext">Hours</div>
<div><span class="minutes">.</span>
<div class="smalltext">Minutes</div>
<div><span class="seconds">.</span>
<div class="smalltext">Seconds</div>

When I load the page however, only the labels Days, Hours, Minutes, Seconds displays. The javascript is supposed to calculate the time remaining and output the information in the content of the page with the span tags.

Does anyone know where I'm going wrong? Is the page even calling the javascript correctly?

  • Using your browser's developer tools, do you see the JS file being loaded on that specific page? Also, do you see any errors, especially JS errors in the Console?
    – Adi
    Commented Sep 17, 2015 at 17:31
  • I do see "Failed to load resource" messages in the Console Commented Sep 17, 2015 at 18:08
  • Is js/countdownClock.js one of those resources? If it is, you should see a message indicating why the resource was blocked.
    – Adi
    Commented Sep 17, 2015 at 23:11
  • clear both browser cache and server cache Commented Sep 18, 2015 at 2:06
  • use your function inside document ready. Commented Sep 18, 2015 at 7:02

1 Answer 1


Because you're loading your javascript in the HEAD it's downloading the file and executing the code before the content exists on the page. A simple solution can be found below which would execute your function once the page content was ready to be executed against.

Update the final line of countdownClock.js like so:

    initializeClock('clockdiv', deadline);

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