Autosuggest and Autocomplete Ajax scripts
http://www.javascript-examples.com/autocomplete-demo/
http://www.phpguru.org/static/AutoComplete.html
http://wick.sourceforge.net/wick_sample/
http://www.brandspankingnew.net/archive/2006/08/ajax_auto-suggest_auto-complete.html
http://www.dhtmlgoodies.com/scripts/ajax-dynamic-list/ajax-dynamic-list.html
http://gadgetopia.com/autosuggest/index.html
http://www.dhtmlgoodies.com/index.html?whichScript=ajax-dynamic-list