After adding product in cart, stay in cart - URGENT

[dream3w]

Hi,

I'm on J2.5.4 and VM2.0.6 (http://bike.dream3w.com)

When I click on 'Add to Cart', directly goes in the cart and not possible to go on other product with categories.

My website is online and need to be fixed ASAP.

Thanks for help

Stephan

[dream3w]

With IE, I've got this error message:

• Message : Object doesn't support this property or method
  Ligne : 301
  Caractère : 4
  Code : 0
  URI : http://bike.dream3w.com/panier
  

With Firebug on Firefox:

• $("select.virtuemart_country_id").vm2front is not a function
  http://bike.dream3w.com/panier
  Line 301