URL Rewrite Rules in Web.config

[Krus1972]

Hello,

We own the website

http://popularauctions.com.

Our standard url for searching is popularauctions.com?thesearch=keywords+here

I was told that you could set up some simple rules in the web.config file so that the search URLs entered into the browser could be entered in this format: popularauctions.com/keywords+here/
and then they would be converted into the first format for the script to execute properly....

Could someone provide a sample web.config that accomplishes this?

Thanks so much