The checkout form is not displaying on my checkout pages.

The checkout form is not displaying on my checkout pages. It is set inline to ‘display:none’.

If I set the form to ‘display:block’, it appears, but doesn’t allow you to access any of the other fields: ‘Shipping Address’, ‘Shipping Method’, ‘Review Order.’ Clicking ‘Continue As Guest’ takes me directly to PayPal. What’s going on here?