AJAX Form

I need a form created that will display different options based on the selection from the first radio button. 1. There are 4 radio buttons to be displayed across the page - name="type" and options are win, place, quinella, trifecta 2. After selecting a type the form should update based on the selected option. * Win - dropdown list of horses from the database, text field to enter a value to bet * Place - As per Win * Quinella - Two dropdown lists of horses from the database, text field to enter a value to bet. The second dropdown MUST repopulate after a user chooses the first horse. The repopulated dropdown MUST exclude the horse selected in the first dropdown * Trifecta - As per Quinella except with 3 dropdowns, each to repopulate upon selecting a horse. The form should fit within a 480px wide table. I will do the styling of the form and provide the database queries for the dropdown menus. This form is to be used on an FBML Facebook application. It MUST work within Facebook canvas.