This one is a PHP, AJAX , MYSQL Autocomplete from Database.
The AutoSuggest class adds a pulldown menu of suggested values to a text field. The user can either click directly on a suggestion to enter it into the field, or navigate the list using the up and down arrow keys, selecting a value using the enter key. The values for the suggestion list are to provided as XML, or as JSON (by a PHP script, or similar).
The results of the first request are cached on the client machine and are filtered as the user continues to type, to reduce the number of requests hitting the server.
This one uses a mysql data. I have given two examples in this to help u. One is autocomplete from static data and other is autocomplete from database. This autocomplete is based on bsn-autocomplete v2.1.3 autocomplete for static data. If u want this for mssql database then Pm me at my email-id: [email protected]