Bind your JS onclick-event to the form (not the button) like this 'onclick' => 'form_success_client(this); return false.
You can use jquery . Post , . Get or .ajax.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.