Lightbox JS Error on Magento in IE9 - Unable to get value of the property '0': object is null or undefined

Question

Debug from IE

Line: 2 Character: 580 Code: 0 Error Message: Unable to get value of the property '0': object is null or undefined URL: http://100repupgrade.clubnetdev.com/fresh//media/js/skin/reprebate/js/lightbox_cp.js

URL where problem can be seen: http://100repupgrade.clubnetdev.com/fresh/featured/the-hundreds-mike-jacket-grey.html

At the above URL, if you click on the 'Size' drop down box, the debug error pops up as copied above. This is coming from a Magento extension that is apparently compatible with this version of Magento (1.6.2.0). The section it appears to be referring to in the js file is:-

while(this.imageArray[imageNum][0]!=imageLink.href){imageNum++;}}

This is only an issue in IE9 (and possible other IE versions), there is no problem in Firefox, Chrome etc.

When the problem occurs, clicking on the drop down box should just display the product size options but instead it is loading a dark overlay associated to the lightbox.

Would anybody be able to identify at all what the issue could be and how to fix at all please? This has had me stumped for about two hours now.

Any help greatly appreciated - thanks.

EDIT: More Info.

An exact replica of this site and code works fine at http://www.reprebate.com/featured/the-hundreds-mike-jacket-grey.html by the way. This issue has only become apparent since upgrading Magento from 1.4 to 1.6 but the lightbox extension developer definitely reckons his extension works on 1.6... Thanks

Answer 1

From what I can see, you are seeing an issue with Lightbox or Prototype, not the extension.

My recommendation would be to ensure you have Lightbox 2.05 and the latest version of prototype - if you want to keep using the prototype version.

If you are happy to move to a jQuery version, Lightbox 2.5 is your best bet

Answer 2

Same problem here. Solved by upgrading from prototype.js 1.6 to 1.7.