How to make Online iPhone "Card Game" with HTML5

How to make Online iPhone "Card Game" with HTML5

What are the necessary things for creating card game on iPhone??
The purpose of this app is to share the ideas by using cards. Each player
will draw a card and do what the cards order to do such as write the
comments on those topics and so on.
I'm quite new for the programing. I don't want to learn Objective-C. It is
quite hard for me. I have searched on google that PhoneGab can port
HTML5,CSS&JavaScript to be an iPhone app. So the things that I must learn
are HTML5,CSS & JavaScript only?
This app must have many players to play for sharing the ideas. Therefore,
must I learn other programing languages? such as, php.. to manage each
player data (profile).
Moreover, I would like to use points, badges, leader board in this app, too
How about and SDK or any software to help me write code easier?
(p.s. Sorry for my bad English)