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Max Ad-Free: Enjoy your movies and shows on your regular cable channels and On Demand without ads for $15.99 a month. You can also enjoy them on the Max app, which has an expanded catalog of programming.
Max with Ads: Enjoy your movies and shows on the Max app with ads for $9.99 a month. Regular HBO live cable channels and On Demand content on your TV aren’t included.

Don't worry, this sounds complicated but it's just a simple browser setting. You can usually find JavaScript options in your browser's Settings, Preferences or Internet Options menu.

Here are the instructions how to enable JavaScript in your web browser.