Hi Adam,

Thanks for the answers provided to 3 and 4.

I have a followup question for Item 5:

I am already a user in my application.  I have 4 windows including chat in a single page, which I can manage at client side js.  And the chat window will be defaulty hidden (not closed, just hidden) (we are using google windoo api for this). When I am to receive to a message from another user, is there any way that I get to know whether the message has come.  Anyway It will show the message if I click on the chat window.  But without clicking on the chat window is it possible to alert the user in any way that there is a chat message to be read.

Please let us know if you need more information.

Thanks