Form Submit Query

I would like to create a form which allows users to enter a search string, and for the search string to be appended on to the end of this URL:

http://www.oracle.com/pls/db92/print...h_string=BUYER

Where 'BUYER' in the example above would be replaced by whatever they type in the search form.

Of course, if I had the URL of the search form, I could hack that up. But all I have is the URL above - I can't actually find the search form.

This is what I would like to do:

1. User enters search string (e.g. APPROVE)
2. User submits form
3. Form takes this URL "http://www.oracle.com/pls/db92/print_hit_summary?search_string" and appends the value from the form onto the end of the URL

I could do this easily if I had access to a server-side scripting language, but since I don't, I wanted to see if I could do this using JavaScript.