4. The computer-implemented method of claim 1 , wherein the first user interface gadget contains a reference to a respective behavior definition that defines the first trigger event condition and a script to perform the first action on the first user interface gadget.
4. The computer-implemented method of claim 1 , wherein the first user interface gadget contains a reference to a respective behavior definition that defines the first trigger event condition and a script to perform the first action on the first user interface gadget. 5. The computer-implemented method of claim 4 , wherein the reference to the respective behavior definition includes at least one of a definition of an action as an attribute of the first user interface gadget, a reference to an identifier of another gadget, a reference to a behavior identifier, and a reference to a tag associated with a behavior definition.