Detect the HTTP State of the browser

Detect the HTTP State of the browser

Hi,

I am looking how to detect/identify the HTTP state of the client browser. I am aware HTTP is stateless.

The reason is I have a financial website which needs to be refreshed first time only once the user logs in to client PC. But my problem is 
  1. How to uniquely identify the client keeping in my that each client will have their ISP/company router's IP.
  2. Each client will have different power scheme options defined and set, thereby some client pcs will revert to sleep mode.
  3. I could probably use HTTP META REFRESH, but this is an overhead and doesnt really control the refresh when the user logs into the pc.
So how can i achieve the REFRESH the first time the client logs into to pc and then make sure it website doesnt refresh again so that avoiding the infinite loop.

Rgds,
Soni