Adding a search bar

[socks198915]

I am interested in adding a search bar to my web site and was wondering if anyone knows of some different ways of doing this. I know of the google search bar, but I may not be able to use it as it requires advertisements if you don’t pay (according to my information). What I would really like to do is something like the search bar of this page:

http://www.sunnyneo.com/

Or is it way to much trouble and should just go the easy route with google, even though if won’t have an image function....