Imagemap applet which can manage complex polygonal and discontinuous image-switching hotspots. Ideal for real-world diagrams where the user locates important places visually and then rapidly extracts the information required with a context-sensitive display or pop-up. Combines multi-level pop-up submenus with a context-sensitive preview screen which instantly updates information in response to mouse movements. Provides an ideal interface solution for a visually-orientated high-speed information retrieval system.