What exactly are you attempting to accomplish? A remote rollover...simple rollover...? A lot of the more basic Javascript functions should be a "drag & drop" option in your web design program.
Theirs so many things Javascript can do.I used 1 code on my sample page www.sporadicdesigns.com/sicc1.html If you right click on the image you wouldn'y be able to save it to your hard drive...That code is easily cracked tho..You have to be more specific on what you want...