Silly people!
Zone.com uses ActiveX and Javascript to launch their Lobby Client from their website. The actual lobby system of chat/tables/launching is all DirectPlay / DirectPlayLobby architecture.
In case you don't know buddy, HTML is basically a visual scripting language for the web. It has no "programming" capabilities like the ones that would be needed for something along the lines of what you are thinking.
Oh yeah - you can't get a program's source just by viewing the page source code.
ReT