I work in Firfox 16.0.2 and all seems to work fine. But in Firefox 15.0 and in Chrome the products will not go in to the cart. How can this be solved en how can i be sure that is works fine in al the other browser versions. Is this a thing for my hosting company? I read something about it on this blog, but i did not understand it completely. I hope you can fix this, thank you in advance!