I was wondering how to swap a page's CSS after it gets scrolling out of its default location.
An example of a site that uses this is Deviantart.
This TODAY BROWSEWHAT'S HOTUNDISCOVEREDDAILY DEVIATIONS menu is suddenly fixed once the page has been scrolling.
Does anyone know how to reproduce this to use on my websites?
NOTE: I unfortunately do not know if this is CSS or Javascript, if it is possible, someone can correct my question.