on mouseenter
sprite(the currentsprite).locV = sprite(the currentsprite).locV + 10
end
on mouseleave
sprite(the currentsprite).locv = sprite(the currentsprite).locV - 10
end
attach this script to the object you need to have move in and out. NOTE: this wont move all your buttons with it, add lines of sprite(X).locv..... for every button to the mouseenter and leave scripts.
play with it for a while, if you cant work it out reply and ill give you some more pointers