User Logged by windows authentication

Hi Guys,

 i have a webapplication with windows based autentication, then in browser i have selected prompt user id and password , when ever clicked on link

 first prompt user id password i have  logged in using application ,  after that i logged out application, browser not closed again clicked on link it will not prompt for user id and password , directly logged in application,

could please help me how to clear previously logged details.

 

THanks

Subhani Shaikh