IN THIS CHAPTER
Applying a DHTML API
Scripting, dragging, and layering multiple elements
Accounting for incompatibilities among modern browsers
Dynamic HTML (DHTML) allows scripts to position, overlap, and hide or show elements under the control of style sheets and scripting. To demonstrate modern cross-browser DHTML development techniques, this chapter describes the details of a jigsaw puzzle game using pieces of a map of the lower 48 United States. (I think everyone would guess where Alaska and Hawaii go on a larger map of North America.) I chose this application because it enables me to demonstrate several typical tasks you might want to script in DHTML: hiding and showing elements; handling events for multiple elements; tracking the position of an element with the mouse cursor; absolute positioning of elements; changing the z-order of elements; changing element colors; and animating the movement of elements.