Maximum Purchase quantity - when exceeded call for pricing

[tkgraphics]

Hi,

I've set a maximum purchase quantity of a product of 50. When chosing 51, the user is forwarded to the cart where it has actually been added, but a small notice at the top shows: "The maximum order level for this product is 50 items. Product not successfully added." Well, it IS actually added. BUT what I would like to achieve is that when an amount over the maximum is chosen, the user is not forwarded to the cart, but instead gets a notice of calling for price instead.

Can anybody help me achieve this?

Thanks.

Joomla 2.5.11
Virtuemart 2.0.20b