I am using ASP and vbscript and want to pass existing URL parameters when a customer logs in. It is for a shopping cart application. The customer has chosen the products to buy, then goes to the login page.i can redirect to Cart1.asp, but I want to redirect to cart1.asp?email=<%=(rsBookSession.Fields.Item("Email".Value)%>

Any ideas?

Create a hidden field with the users email address <%=(rsBookSession.Fields.Item("Email".Value)%>
in the login form to pass a cookie. Then request the cookie on your Cart1.asp page.