writting on text_field

Hi, I am using the live search method from Rails CookBook book, and I would like to pass (and write) the parametters from the search to the a text_field example: student -> name, id college -> id, student_id

I would like to show in the /new view of college the student name and write in a text_field (or hidden_field) the student_id I would like to do it using the live search and not using select or collections select since i would have like 400k students...

Thanks in advance