add a hash to url without scrolling page?
with javascript

1. i open page


2. i scroll down


3. i click link that adds a hash (maybe with a value #test) (example: http://www.example.com/#test)


4. the page MUST not scroll back to the top.

how can this be done?

note:
just checking if it's possible to disable the movement even if there is some tag with id=test
so far the return false; works fine (to support people without javascript), and also to avoid the presence of the id's in the html, but it is not a problem with things like numbers, like 1, 2, 3 (they are not allowed as id's anyway)

all the answers are great, nothing new or groundbreaking, and no solutions on how to break the default functionality, but it will do. :)
thank you for taking the time to answer.