How to make an image scroller with up and down buttons

Hello to you all,
Would like to know if someone could point me in the right direction and tell me how to make this [FONT=Arial][SIZE=2][COLOR=#0000ff][/COLOR][/SIZE][/FONT][FONT=Arial][SIZE=2] (“commissions”),im sure it’s very simple or i at least hope so.[/SIZE][/FONT]
[FONT=Arial]If you look at the link i have given and go int to the right hand menu ’ commissions ’ you will find a selection of images that move up and down … i would like to do the same but with two buttons up and down.Any help would be more than welcome.[/FONT]