Autosuggest Textbox

We are looking for someone who can develop an autosuggest textbox which will be implementend in our existing website. The textbox will be used for entering the name of a city for our travel related website. We will provide a list of cities which need to be suggested when the users starts to type the name of a city. This list consists of two types of cities: A. Cities listed at our website B. Cities not listed at our website Cities A and B are both included in the list of suggested cities. Whenever the user starts to type an A city the suggested cityname needs to highlight in the list. Whenever the user start to type an B city the suggested cityname needs to remain normal (not highlighted). After entering the cityname the form needs to redirect the user to link 'A' when entering an 'A City' and to link 'B' when entering an 'B City'.