Viewcart will not proceed to Checkout or Continue Shopping
I'm really pulling my hair out now! I have a checkout process that is pretty much functional, (I have a couple of open threads on specific issues) but for the most part everything was working like it should be.
Then I started working on adding a dropdown to the checkout page for the customer to choose a shipping service (express, ground...). I read how to do it on one of the threads here, and did all of the steps described, then was ready to test it. So I went to my site, added a product to the cart, clicked Checkout... Nothing happens! I click Continue Shopping... Nothing Happens!
I tried removing the Checkout button and adding it again from the Server Behaviors, not any better.
I went to the checkout.php page to see where the "getContent" and "eCart Redirect" were, they seemed fine, I tried them in different places... no better, I restored the files from time machine, still no better, I restored the complete site directory as it was yesterday (when everything except some custom features worked fine). Still the same result! If I access checkout.php directly by typing it into the address bar, I can go there and checkout fine!
Any insight would be VERY MUCH appreciated.
I have attached my viewcart.php and checkout.php pages, if that will help.