[Closed] need help for animating

i was a hummer already designed and its good 2 go.
what i would like to do is this :

while the hummer moves forward in a straight line (which i got doing ok) from frame 0 to 100,

i want the chassis to move up and down (as if if its bouncing onthe springs), randomly from frame 0 to 100.

any help would be much appreciated.

btw. im really new to maxscript…and really new to programming/scripting. (about 1 month)