In an active direcrory based windows authentication, how can we allow other active directory users to login to the web application from a user's profile without log off the PC from that specific user profile? In a sharepoint portal this is possible, where u may see an option for 'Log in as another user'.

I am using active direcory based windows authentication in my intranet application as explained in the article http://weblogs.asp.net/scottgu/archi...on.aspx#457094.

Everything works fine. But I need a mechanism "Log in as another user" like in sharepoint portals. When user clicks on "Log in as another user" button, the borwser must prompt with the network authentication dialogue box where user must enter his Active directory user name and password. So my question is, how can i invoke browser's network authentication dialogue box from c# code? Is there any other way to implement this "Log in as another user" functionality?