I see that the slide out div has an href attached to its button of

http://link-for-non-js-users.html/

Trying to think logically it seems to me that if javascript is not enabled then the button should lead to a page where the user can see the slide out div's content.

If I turn off javascript the button disappears and the div content is displayed at the bottom of the page. If this is expected then what would be the point of the href attribute?