This example demonstrates Real Estate Portal USA Parcel Overlays as a Tiled Map Service in ESRI's ArcGIS API for JavaScript Version 3 while showing the number of tile and "parcel" (vector & attribute) requests that you have made in this session. Reloading this page will reset the tile and parcel counters. If you are looking to View -> Source to see example code for developing your own application, you probably want to see this similar page without the counter code.
So far in this session (since this page has been loaded), you have made 0 tile requests and 0 parcels requests.