In Magento CE 1.7.0.2 in js
directory there is file blank.html
What is purpose of this file exactly?
Magento Stack Exchange is a question and answer site for users of the Magento e-Commerce platform. It only takes a minute to sign up.
Sign up to join this communityIt's used by some Magento modules like Authorizenet as a fallback page for iframes. Other uses I have't found for it yet.
The actual URL will be set with javascript most likely, the blank html page is just to give it something to initially load.