Hi Thanks for the replies for my previous question.
I m beginner to coldfusion and I will explain my whole problem in detail now.
My client had developed an application in coldfusion and we are using that.
Actually there is no login system for that application.The user can enter into the application based on the cookies file.suppose if the loginid in the cookies stored in the system and loginid in the users table in database matches,Then the user will be able to login to the application.
The user has a separate application to register.
Now the problem is whenever the user reregisters again the ids wont match.so everytime i have to get cookies file from user and have to modify it and ask the user to keep it in the same place.
its really problematic because whenever the user forgets the password user is registering again such that there are duplicate entries.
I can create a login system for the users but how to delete all the cookies system in my application code so that these error wont arise again.