Yes, those javascript errors will prevent the page's javascript from operating properly, including the payment portion.

It looks like all the javascript-validation logic on your page has been altered to inject a bunch of button and aria and other code which also uses double-quotes that are conflicting with the double-quotes used to display validation messages. You've probably injected all this extra HTML into your language files.

ie:
Code:
  alert("<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>This form has already been submitted. Please press OK and wait for this process to be completed.");