c# HTTPWebRequest or HTTPRequest javascript problem

I am looking for a method in C# that allows me to read client side java script variables<b>or</b>
I cannot seam to get the values for client side javascript variables within a HTTPWebRequest
Suggestions that don't include using a client side browser such as WatiN or incisif.net
Thanks :)

Javascript notes:
When i look at the source code for different types of output on the same secure page.
The source code is identical. I cannot just parse the source code to determine what the javascript is trying to display. Clearly the web server is sending variables to the client some how. Is there a way to show all variables sent to the client via HTTPWebRequest?


Current situation:
The method also must be able to run in the background or scheduled.
C#/WatiN freezes or hangs when a Dialogue pops up for login/password while being run from a scheduled task.
Pumping client side javascript through a browser is not an option apparently.