In order to be nice to the user and not controlling their navigation for them (ie: forcing somebody to go somewhere they do not wish to be placed), how about the following solution:
First of all, do not use javascript. That's just asking for problems and possibly death by thrown stones from your users. Second, yes you could do as you have proposed with the temporary file, but you are still forcing the user to move, which may (and most likely will) upset certain people. I propose a modified version of your idea. Rather than redirecting the user to the anchor in the page, redirect them to the page... with no anchor. Create the temporary file with a type of Table of Contents/Index at the top of the file, composed of the anchors on the page. That way the user is in control!
IMO, anchors were created for table of contents and linking between related subjects within a page. Thus, anchors should never be forced upon your users: provide a table of contents/index and then the user can use this or just scroll through the page :)
