I was wondering if anyone knows how to do this? My client wants a Modal pop up window to appear if a customer tries to buy more of one item than it has in stock. Is there a way of doing this? I can't seem to find any sort of extension that does this. All it needs to do is to be able to pop up if the customer tries to add to the cart more of an item than there is in stock. It can just say something simple, like sorry not enough in stock.
Can anyone help?
Thanks in advance