Hi Schoolboy.
The product price is for squaremeters
In the product description there is a javascript module where the visitor can give in the height and the width that he want.
The quantity of the calculated squaremeters will be written autimatically in the field cart_quantity that's made readonly, so that the correct quantity wil be given to the cart.
But i need the calculated height and width in the cart also, so i want to set it in a hidden field.