Apply Java Script (One should be very good in java script) -- 3

To write javascript to a part of website(responsive design) so as to display sketch/image(of Flat) based on the Flat selected under a Building. There are 3 Towers, under each Tower there are 3 Flats and for each product there is an image. Building A -> 1 | 2 | 3 Building B -> 1 | 2 | 3 Building C -> 1 | 2 | 3 Particular image/sketch should be displayed based on the Building and Flat selection. Say if Building B and Flat 3 is selected (by Clicking) the corresponding image/sketch should be displayed. Once script is developed, the same should be integrated to the existing page as well which is responsive and contains other scripts as well. Regards,