Moving an element by a specified offset

Moving an element by a specified offset


This is probably a very lame question, but I cannot seem to find the
answer in the demo section of the jQuery UI website nor on Google, so
here here we go: Is there any simple way to gently slide an element a
specified number of pixels in some direction, and then leave it their
until I tell it to reset to its original position?
I would be able to cook something up myself using a timer and som css
(position: relative), but as it seems quite trivial, I expect that
there might be a simple library call to do this.
Thanks in advance.