I have a set of options to choose before adding the item to the cart (wheel chair purchase with 4 custom options to choose)
I would like one each of the four options to be required to select before hitting submit. If any one of the options are not selected I need an error message to come up in the cart.
Reading the wiki
I found this class: "class="fc_required"
Where would I add this and/or how can I require the options to be selected (and if not an error message appears requiring the option(s) ) before the guests checks out?