Thanks for the information, i found out that the modules from the BT- gallery is the problem, when i unpublish these the module works. Should i contact BT-gallery for this?

Two JavaScript errors:

One by your template, one by com_bt_media

Timestamp: 24.10.14 09:30:22
Error: TypeError: $(...).ready is not a function
Source File: http://www.gijsgroningen.nl/templates/gijs/js/timesfx.js
Line: 1

Timestamp: 24.10.14 09:30:22
Error: ReferenceError: BT is not defined
Source File: http://www.gijsgroningen.nl/
Line: 106

Probably some errors are also caused by an outdated jQuery version:

The problem:

<script src="http://www.gijsgroningen.nl/components/com_adsmanager/js/jquery-1.8.0.min.js" type="text/javascript"></script>

Correct one (In Joomla 3.3 jQuery is provided by Joomla itself)
<script src="/media/jui/js/jquery.min.js" type="text/javascript"></script>

Is there no update for com_adsmanager?

There is generally a mess of javascript libraries on your home page (jquery ui also loaded multiple times etc. ), you should really try to merge that!

And your template uses jQuery not in compatibility mode, which is required in order for mootools and jquery work together (that's causing the first error):

http://www.gijsgroningen.nl/templates/gijs/js/timesfx.js

$(document).ready(function () {

should be for example

jQuery(document)..

You should really try to clean that up - maybe there are updates for your template and extensions.

Cheers,

Yves

Hello thanks for helping me out, you can see my site here: My Website
The module is located in mid-top (Nieuwsbrief GIJS)
Thanks.

Hi Berd,

without a link to your home page it is hard to say. (If you want to keep it private, just drop us a line at contact-us@compojoom.com)

Cheers,

Yves