Have you done anything at all? if so post it and be more specific in your question, tell us what is it that you are stuck with because to tell you the truth I don´t really think anyone here will do all the work for you they will surely help you out along the way.
if you have PHP knowledge I think you will be fine with javascript they are not the same but many things work the same way, you should try it and if you get stuck with something just come back and someone here will help you out.