Navigate requested url after login

Question

Hi All,

I do not know how to start this issue?

My issue is here:

When user enters this url (http://darma/allproducts?prodID=14&Mode=Refresh) in the browser.

It redirects the default page (loginpage.aspx).
In login page there is user name and password textbox, after entering correct username and password I wanted to show the requested page in browser, that is (http://darma/allproducts?prodID=14&Mode=Refresh).

Advance thanks,
Darma