Hello,
We have a product with a dropdown and a text entry field. We would like the dropdown to default to no selection to force the customer to make a choice and not just add to cart with the default option. We would also like to add a regex validator to the text entry field.
We do not have the source code, and our site is precompiled, so no access to the code behind. Is there a solution to achieve our product requirements using other methods than source/code behind modification?

Thank you for your time.