JS photo slideshow

Hi, I am somewhat new to javascript and website design, (as in I mostly try to follow tutorials to figure how stuff works) and was wondering how I would make a rotating photo slideshow (in js).

Such as in the following sites:
http://www.1stwebdesigner.com/wp-content/uploads/2010/02/clean-layout-photoshop/final_small.jpg

and

http://www.1stwebdesigner.com/wp-content/uploads/2010/02/clean-layout-photoshop/final_small.jpg (but instead of clicking on the photos to rotate, an arrow to rotate, such as in the first image/example)

Thanks so much in advance