Setting one value to correspond with a parent

[squeal]

Hi,

I've posted a similar question elsewhere but after a few days without response I thought I'd try my luck here...

I'm trying to get isotope.js and shadowbox.js to play nicely together.

To achieve the result I want I think all I need to do is set the value of 'x' in the following ('rel="lightbox[x]"') to be equal to its parent opacity.

<div class="thumb theme-Portraiture media-Works_on isotope-item isotope-hidden" style="position: absolute; left: 0px; top: 0px; -moz-transform: translate(28px, -5px) scale(0.001); opacity: 0;">
  <a rel="lightbox[x]" href="image_one_large.jpg">
   <img title="Image One" src="image_one_small.jpg"/>
  </a>
</div>

My guess is that there are at least two ways of doing this - either by extending the isotope script or by using some sort of 'onChange' preg_match. Right now, all methods escape me! :-(

This seems so simple, but I just can't figure it out, so any help vastly appreciated!

[squeal]

My best guess so far is to add a line like this:

$('a[rel^="lightbox"]').attr('rel','lightbox[PARENT/PREVIOUS OPACITY GOES HERE]'');

[squeal]

So, continuing this conversation with myself... this is my new best guess. It doesn't work, but equally doesn't throw any errors in Firebug either, so I'm none the wiser...

$(function() {
var opacity = $(this).parent().attr("style","opacity");
opacity.change (function() {
$('a[rel^="lightbox"]').val('rel','lightbox['+opacity.val()+']');
});
});

[squeal]

For neatness, I'm posting my solution here. It's not perfect but it'll do for now...

$('.option-set').change(function() {
var $this = $(this);
var delay = 1100; // 2 seconds delay after last input

clearTimeout($this.data('timer'));
$this.data('timer', setTimeout(function(){
$this.removeData('timer');

$('a[rel^="lightbox"]').each(function() {
var opacity = $(this).parent().css("opacity");
$(this).attr('rel','lightbox['+opacity+']');
});
Shadowbox.clearCache();
Shadowbox.setup();
}, delay));
});

I consider the problem solved (for now) so I'm happy for this thread to be closed.