Redesign Select Boxes on Website Page

Hi I have developed a website [login to view URL] which allows children to practice and develop Maths skills (aged 5 to 12). I am looking for somebody to redesign the selection process for choosing problems The current page can be seen by selecting PRACTICE from the home page. JQuery and CSS skills required The redesign I want is similar to what is seen in [login to view URL] There will be two columns - Pick a Topic and Pick a skill Above the two columns will be section that will default to a particular class, which the user can user via a select box. On changing class contents of Pick a topic will change The first column will be to Pick a Topic (containing Strand and Unit) On picking a topic, a list of Units will appear beneath, similar to picking a subject in the Study Clix website. On selecting the Unit, the second column will be populated with Skills. On selecting a skill, a list of problems will appear beneath, similar to pick a topic When the problem is selected, the user will navigate to the practice page (similar to Select Skill functionality on current page). In addition on hovering over a problem a preview of the problem will appear. Current functionality can be seen at [login to view URL] Instead of the current ajax calls, the programmer can put function place holders to populate the lists with sample data Regards Declan