Classic ASP create search text box that dynamically updates

This maybe a simple a request , I dont know... I have a classic asp site that I want to add a search textbox. Basically when people start to enter characters of a location in the textbox it updates with a list of locations that match whatever has been typed upto that point. The list will be database driven and have a Town and then Region columns and there will be thousands of records My database is MS SQL Server 2008. A good example of what I want to achieve is found on this site when you add a skill the page suggests a match, this is identical to what I am after. I have also added a screen shot of what I am after. It shows someone has entered ' Lon ' and the list has matched to London , Londonderry etc Thanks in Advance