The following example implements the drag and drop objects with custom boundary restrictions. In other words, objects are not completely bound to the dimensions of the Web browser client window. Note that dimensions can be restricted to the extents of the client window or to absolute virtual coordinates specified for the top, left, bottom and right coordinate parameters in pixels. Each object has been assigned specific boundaries within which they may be moved. The ability to specify drag and drop object boundaries benefit complex user interface layouts when objects must be constrained to certain regions of a Web page. Note that all examples are included with ddobj.