creating a link using values from different fields

creating a link using values from different fields

I want to write a script that will assemble a url from three fields - one that contains a street, another with city and a third with the state. My goal is to create a url that will link a particular address to google maps. An example url will look like:
http://maps.google.com/maps?f=q&hl=en&q=123%20Main%20St.+Peoria+IL
What's the best way to do this?

Secondly, how do I incorporate that url into a view?

Thanks for any help!