http://net.tutsplus.com/tutorials/javascript-ajax/10-rare-but-clever-javascript-techniques/

I found this site with 10 useful tricks for javascript!  These are the sweet ones, like allowing a site visitor to zoom in on an image just by dragging the mouse overtop (#5:Magic Zoom).  These are great for product photography, or digital artists like me who like to show high-res images.  There are also links to demo videos to see it in action.  Very helpful!