Auto-Complete Function needed for Custom System

Hi, Currently we have a custom system built our on website, however due to large volumes of work being entered into the system it is starting to become difficult and time consuming to locate relevant data within the database. Basically our system revolves around racing, you enter in a participants name into the database, then you create a race name. From there you must scroll through all the participants that have been previously entered into the system locate the desired participants names then add them to a specific race. as we add more and more participants it is becoming more and more difficult and time consuming for the system to load all the participant data then actually locate the relevant participant name. What we need is a company or person who is able to read through the code on our system which is quite small and implement a new text box where you can type in the desired participants name then an auto complete function where if the user begins to type in a participants name it automatically scans the database and locates possible participants names depending how many letters have been entered. Its exactly the same as a regular auto complete function that you may use in Google for example. All the relevant information in regards to the site and system will be sent to the winning bidder. Any questions please ask. Regards Nathan