That may work, but the problem is that....
on A page, on page load, you check cookie, and then redirect...which is going to be same A page with querystring...then ...again..it fires the...
Let's say you are on A page.
You clicked one link on A page to go to B page with querystring like this (B?wow=1234)
You are currently on B?wow=1234 page.
You press "BROWSER BACK BUTTON"....