I seem to have broken my site.

I can add a product in Admin and have it display, but the add to cart button and the view cart buttons seem to have no effect.

I've made some design changes, and I must have inadvertently omitted something.

I'd appreciate any help.

See page here:
https://www.ragandbone.ca/boxoffice/
and
https://www.ragandbone.ca/boxoffice/products.php

Never mind:
I had accidentally deleted this line:

<script type="text/javascript" src="js/ectcart.js"></script>

That'll do it!