Remember values across productlist navigation
There might be some information you wish to remember after acquiring it (for example trough use of the $custom function). You can do this by making input fields with a specific prefix: _form.
All data stored in a input field (for example hidden, or text) will be remembered even if the customer navigates between pages in the productlist. This will make sure the information is still available when you need it.
Post your comment on this topic.