Uncaught ReferenceError: Virtuemart is not defined

When pressing the F12 button in Chrome, I notice some errors on my page. Don't know if these errors will hurt. I don't see any malfunctioning on the page, so it doesn't affect the customers, but I like them to be solved.

One of the errors on the homepage is: Uncaught ReferenceError: Virtuemart is not defined
On other pages the error is: Uncaught TypeError: jQuery(...).chosen is not a function

On the Virtuemart forum they say it's template related.

Strangely, the demo of Storefront doesn't show this error, so it must be a configuration issue.

There also to other errors, which do show up in the storefront demo also.
These errors are: Invalid App Id: Must be a number or numeric string representing the application id.
and: FB.getLoginStatus() called before calling FB.init()

Does anyone know what these errors are and how I can solve them?

Website: http://www.waterpijp-bong.nl

Hi

I've just checked Your site and I think it's something browser specific. I'm watching it in Firefox and there is no errors mentioned. Anyway, form the messages I can tell it's nothing serious.