Now.js + Express -> Disconnect issue

this is a question to all the Node Gurus out there:

I'm new using NowJs with Express and i'm building a poker site. The main problem that I have is :

When a User creates a game, opens a new window and close it. When closing this second window the Disconnect event is triggered disconnecting the user from the first window

How can I avoid this issue? There's gotta be a workaround Also, I'm I doing right to use NodeJs and Express as base to a website that will store credit card information? If not, what is the best way to build a poker site?

Thank you very much for your help