Continously refreshing results in different posts focussed

How about basing the URL on the post that currently takes the middle of the page? I mean the post that the vertical pixels at client.size / 2 belong to. Usually you should be focussing on the middle of the page, and even if not since opening the url will center the posts we can assure the page opens roughly at the same place where the reader left. (It also makes hotlinking a post easier because I can use ctrl+l to focus the location bar and just need to copy, compared to locating the post’s timestamp, clicking and then copying.

I believe that the same attempt could be used for this problem.