loadArchive:

Connects to a given URL by initiating an asynchronous client request.

Reloads the initial request passed as an argument to loadRequest:.

Performs an end-to-end revalidation using cache-validating conditionals if possible.

Stops any pending loads on the receiver’s data source, and those of its children.

Loads alternate content for a frame whose URL is unreachable.

Sets the main page contents and base URL.

Sets the main page contents, MIME type, content encoding, and base URL.