How to use Lightbox with a flash component

Follow these steps to add Lightbox (possibility to pop-up only images) functionality to Flash files:


Step 1. First, download Lightbox++

Step 2. Copy the css, images and js folders from the archive in the same folder with your HTML file on your web server. This HTML file should embed the SWF file to which you want to add the Lightbox to.

If your site is running on Wordpress or Joomla, you will need to copy these folders in a new folder, let's call it lightbox, in the root of your Joomla/Wordpress site.


Step 3. Edit the HTML file and add these lines in the <head> section:

<link rel="stylesheet" href="css/lightbox.css" type="text/css" media="screen" />
<script src="js/prototype.js" type="text/javascript"></script>
<script src="js/scriptaculous.js?load=effects" type="text/javascript"></script>
<script src="js/lightbox++.js" type="text/javascript"></script>

Make sure you use the correct path for the above files.

For Joomla or Wordpress sites, you need to update the code, to make it point to the root lightbox folder, where you copied the Lightbox folders in step 2:

<link rel="stylesheet" href="lightbox/css/lightbox.css" type="text/css" media="screen" />
<script src="lightbox/js/prototype.js" type="text/javascript"></script>
<script src="lightbox/js/scriptaculous.js?load=effects" type="text/javascript"></script>
<script src="lightbox/js/lightbox++.js" type="text/javascript"></script>

If your site is running on Joomla, you will need to add the code right before the </head> tag of the index.php file located in your active template's folder (e.g. templates/rhuk_milkyway/index.php)

If your site is running on Wordpress you need to add the code in the <head> section of the header.php file located in your active theme's folder (e.g. wp-content/themes/twentyten/header.php)


Step 4 (option A). If you want to have a Lightbox Image Set (with Next and Previous buttons), right after the lines from Step 3 add these lines, otherwise go to Step 4 (option B)

<script type="text/javascript">
function GroupDelegate(id) {
 var objLink = document.getElementById(id);


In the body of your HTML file you’ll have to add invisible links to the images which will be displayed in the Lightbox, like this:

<a id="img1" title="First image" rel="lightbox[img]" href="images/01.jpg"></a>
<a id="img2" title="Second image" rel="lightbox[img]" href="images/02.jpg"></a>


Step 4 (option B). If you intend to have a single image display in Lightbox (as opposed to option A with Image set) you simply have to add these lines into the <head> section of the HTML file:

<script type="text/javascript">
function LightboxDelegate(url,caption) {
 var objLink = document.createElement('a');


Step 5 (option A). If you’re using SWFObject to embed the SWF, make sure you’re having these two params (in addition to maybe other params):

params.wmode = "transparent";
params.allowscriptaccess = "samedomain";


Step 5 (option B). If you’re using <object> </object> tags to embed the SWF file, add these lines:

<param name="allowscriptaccess" value="samedomain">  
<param name="wmode" value="transparent">

And in the embed tag you must insert the attribute:



Step 6. If the links to go to when clicking an image are specified through the XML file, the url attribute, or in some cases the link attribute, must be set like this:
1. For Step 4 (option A):


2. For Step 4 (option B):

url="javascript:LightboxDelegate('images/01.jpg','First Image')"

Also, you’ll have to change the target attribute to _self like this:



Note that the Lightbox will not work if tested locally. You’ll have to test it on a HTTP server.


For a more detailed description visit the original blog post from



Posted 10 years ago

I have changed a bit the instructions on this post, for a better understanding.

This time, if you'll follow the instructions precisely, I'm sure you will not have problems.


Posted 10 years ago

I've cleared out everything on my site, and then uploaded the entire
carousel to the site untouched.
The carousel works fine, and looks good and all, but nothing happens
when I click on a thumb, especially no lightbox.
What am I missing here???

Kevin Simms

Posted 10 years ago


I am confused, when I open the carousel.fla file it appears nothing is there. I am trying to Step 6 but don't see any actions or behaviors????



Posted 10 years ago

So I did all of this and it works beautifully... on my mac, and on my girlfriends mac. But when I tried it on a PC
the lightbox shows up underneath the swf. I have gone through the code over and over again and can't seem to
figure it out. Could you give me a hand?



Chris Wells

Posted 10 years ago

For anyone having problems with a flash movie disappearing underneath a lightbox, you must add the hideFlash - showFlash functions to your lightbox++.js file.

//For example at line 387:

start: function(elementLink) {


//For example at line 676:

end: function() {
var obj = $('lightboxswf');
obj.innerHTML = "";
new Effect.Fade('overlay', { duration: overlayDuration});

//For example at line 817:

function showFlash(){
var flashObjects = document.getElementsByTagName("object");
for (i = 0; i < flashObjects.length; i++) {
flashObjects[i].style.visibility = "visible";

var flashEmbeds = document.getElementsByTagName("embed");
for (i = 0; i < flashEmbeds.length; i++) {
flashEmbeds[i].style.visibility = "visible";

// ---------------------------------------------------

function hideFlash(){
var flashObjects = document.getElementsByTagName("object");
for (i = 0; i < flashObjects.length; i++) {
flashObjects[i].style.visibility = "visible";

var flashEmbeds = document.getElementsByTagName("embed");
for (i = 0; i < flashEmbeds.length; i++) {
flashEmbeds[i].style.visibility = "visible";


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