Error on page at IE8 - gk_image_show.js

I get a error on page in IE8.

When i click on the error :

This property or method is not supported by this object

And when i change the setting in the mod_gk_image_show title=true; to title=false';
i get another error

getElement (...) is null or not an object gk_image_show.js Code: 0 Line: 108 Char: 4
"

The url is : http://www.dajudesign-testsite.nl/be2be-events

hitmusic error IE8.jpg

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Problem solved
The problem was in demo content (the vimeo embeed code at one of the tabs) I've changed the video and the errors should not appear now.
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Sincerely,
Bartlomiej Krztuk
GavickPro WebDeveloper.