How Old Links are remove from google index ?

Hello friends,
Near 20 days before we update our website, we redesign and redevelop it, all the links are new, googel crawl our new website and it's include some new link on it's index but all the old links are still in google index. how these old links are remove on google index?

Thanks

 

just login to webmaster tools, request that the urls are removed and also mod your robots.txt
I recently redevopled my site and had to do this otherwise your users will get a whole heap of 301`s

 

to know more about how to do it, you read this: http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=164734

 

Ask google is the best way.

 

I think there is something .robots.txt to do, I don't have much knowledge about it but you should search about it.

If you are using wordpress then there is an option to show search engine or not to show search engines!