JS functionalities on funnel sites

Order Page

order.js

• Add installment payment element - Not influence with site not have installment
• Add a callback on after product, countries loaded. Callback should be defined in initial-en.js

paymentprocess.js

• Add crollTop function on change payment method
• Also need update widget payment to set default checked

addressform.js

• Add condition check empty Province

exitpopup.js and exitpopup.css need rename into orderpopup.js and orderpopup.css

orderen.js

• Should have function Site.onAfterLoadProducts, it will be called from order.js. Refer note of order.js above.

Change CDN link and Update the link of JS, CSS files in template of  Checkout 1, 2, 3