The following example implements the drag and drop objects with collision detection on another Web page element. Drag and drop objects may be tested for overlap with other Web page elements or drag and drop objects. This feature may be applied to interactive custom applications such as build your own sites, digital or printed cards, sophisticated user interfaces and much more. Rectangular collision detection is included with the drag and drop objects API. It is simple to use and building your own custom applications requires minimal code, since many features may be reused and extended with the ddobj framework API. Note that all examples including this one are bundled with ddobj.

Drag and Drop Collision Detection
Add a field and place it in the recycle bin.