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After the creation of the topic it will show 'click here to view your message ' and 'click here to go to index'.
Before I click any of this link its going automatically to the topic i have created.
How can i solve this?

Yes, it generally has a 2 second gap as far as i know. Can increase for connections with slower speed. There is no way to change it.

Is there a way to increase the 2 sec ?
Then about forum cookie deletion,whether there is a way to delete the forum cookie automatically?

Nopes, there isn't for both your questions.