Strangest situation ever, but I’ve reproduced it on three PCs already. Only happens in internet explorer 9 (not 8, just 9).
It happens at the site of my friend, this is not a plug, but here is the url: IE bug with javascript
The magic error happens when you click one of the links, for example “Nog fiscaal interessant …”
This opens a popup, with inside an iframe that hosts a movie player. The movie frame complains, in IE9, about “Object not defined”, “Array not defined”, “Date” not defined.
What could be going on?
Finally solved by loading the iframe dynamically.
The solution was found on http://code.google.com/p/simplemodal/issues/detail?id=73
Copy/paste here for future reference:
Another link with possibly more info: http://msdn.microsoft.com/en-us/library/gg622929%28v=VS.85%29.aspx?ppud=4
The solution implemented was loading the iframe src after the popup had fully rendered, instead of first loading the iframe and then showing the popup.
Thanks to all investigators!