how to build an autosuggestion for text box

i want to build an autosuggestion for a text box which queries the database and re开发者_JS百科turns the suggestions and then the user can select from the suggestions or types a fresh query. there are over 20 text boxes where i want to have the same autosuggestion.

Here is a tutorial to get you started: http://www.nodstrum.com/2007/09/19/autocompleter/