Select user data from db

Select user data from db

I want to have a dropdown-select with all users in the db, and when I choose a user, that user's data should be auto filled into the form.

Like E-mail, Address, Phone number.

I would like to find a solution that use AJAX/jQuery that makes this action without refresh the page and also that the user data is geting loaded from the db when the user is selected (I do not want all user data hidden in the select list, only the user id)

I've been googling but my ideas for searching has run out after just getting auto complete รก la Facebook search.

(Using PHP/Mysql, Zend Framework)