How do I figure out wich check have been selected?

[Guest_imported]

I need to know how to figure out which checkboxes have been selected by using the DoGet() method, NOT the doPost(). Using the doPost() would be easy because it passes all the selected checkboxes into the requset object, but I cant figure out how to do it using the doGet()! If I place the checkboxes into the session object, I run into a problem when I use the getParameterNames()/getParameterValues -all checkboxes and their values are in there. It dosn't distinguish which have been checked and which have not, all checkboxes are placed into the session object reguardless. HELP! What can I do to find out which boxes have been checked?
Thankyou.