[Editor's note: The Sunlight Foundation uses a neat little Google Maps hack (see Senate Finance Committee Health Care Influence Cluster: The Democrats) to zoom in and out of a static image sans Zoomify, usually used in these situations. Limitations include having to load the complete image before viewing (does not use cached zoom-based tile sets) but looks to be easy to setup and you get the contextual locator map and zoom, pan controls for free.]
(Screenshot below) Continue to the code . . .