This is a mirror of http://www.vim.org/scripts/script.php?script_id=140

Based on some advice given by Benji Fisher on utilizing a buffer local variable to store the current position. It becomes a virtual mark as it doesn't take up one of the normal vim 'marks' a-zA-Z, instead it uses a variable. They are local to a buffer, just like normal marks. Useful for scripts that need to keep position, but don't want to change the user's mark setting.