In this chapter’s case study, we add a Downtown Properties web page to the Lawrence Microgrid website. The new web page illustrates creation and use of arrays and objects that support user interaction with a display of real-estate property features. By “property,” we mean a piece of land, not an OOP property. FIGURE 11.20 shows a display of this web page before any user interaction other than scrolling down a bit (causing the header navigation links to scroll out of the viewport). Note the five text controls at the top—two for an address (“Address Number” and “Street Name”) and three for property features (“Frontage (ft),” “Height (ft),” and “Roof Type”).