Sharon's Billing/Shipping Form

I totally don't get Javascript yet, but I am excellent at making my code match other people's so here is my assignment.

It works, but I really don't understand how or why it works. In order to give myself some more practice, I am trying to add some functionality to validate the form and check for blank fields. Unfortunately, the only thing my formValidate function seems to do is break the otherwise working address-matching function. Argh.

So far no luck, but stay tuned...