The OrbitZoom picture viewer at http://orbitzoom.com provides easy multiple zoom and pan functionality. Simply click the picture and move your cursor radially in any direction to zoom to where you clicked. Click again when you are finished zooming. You can zoom again using the same technique or you can pan by clicking down and dragging. Double click to return to the full view. Here is the only instruction needed:
CLICK ZOOM CLICK – CLICK DRAG PAN – DOUBLE CLICK FIT
You can download the desktop version at right and then drop any jpg, gif, png onto the viewer. Click the arrows to cycle through images in the same directory or set a slideshow with the spacebar.
Download the Website zip file to get OrbitZoom for your Website. Here you can load the swf file in a window of its own and pass it a URL to the picture(s) or you can embed the swf file using the provided code. Instructions come in the zip.