Looking for this nice effect

Question

Hello everyone,
I've been looking around for a couple of days and am trying
to build this smooth easing effect. Please have a view here:
http://www.cozumelrs.com.br/
When you move your mouse around on the 1st page before
selecting languages, everything responds in a smooth mouse opposite
behavior. Anyone worked on something similar or might have any
suggs?

Answer 1

first 2 general comments: 1) if you use setInterval() with a
small time parameter (like 2 ms), then you should use
updateAfterEvent() in the function being called so the stage
updates after the function executes. otherwise, you lose the
benefit of those frequent function calls.
2) always use clearInterval() to terminate a setInterval()
loop that's no longer needed. and an even better rule-of-thumb is
to use clearInterval() even when you don't think a setInterval()
has been defined or you think it has already been cleared. ie, you
can't use too many clearInterval() statements. they cause no issue
when you (try to) clear an interval that doesn't exist. on the
other hand, if you ever execute identical setInterval() statements
you'll have a mess that cannot be fixed after the duplicate
interval is created. (an example is below.)
you can use a similar function, to the above, for any number
of movieclips and any number of easing equations. the essential
part of the easing equations i used is that the number multiplying
yourMC._x plus the number multiplying destX equal 1. that way you
can be sure yourMC._x will converge to destX.
with the easing equation you used for yourMC._x, yourMC._x
will converge to .8*destX.
anyway, to generalize that code: