SEARCH TOOL

I need a simple tool bar developed using AJAX or other similar software. The final result will be a toolbar that allows for an easy search with results pre-determined by the developer (me!). A user simply completes a sentence that begins with "I want to:". The user chooses an action in the first drop down box, such as "Buy" or "Sell." The second drop-down box then dynamically populates itself with items relevant to the selected action, such as "a car or truck." After selecting an item in the second box, the third drop-down box then dynamically populates itself with multiple Internet locations which fulfill the intention of the users sentence, such as "from Honda" or "from Ford. We would need to be able to perform admin functions to populate all three windows and assign the final result based on choices on teh first two windows. EXTRA: Ideally, the final or third window results would also be displayed under the tool bar (see attached) My goal is to use this functionality on a standalone site and some other niche sites to assist user in finding results that we choose in an easy to use format.