Instruction set reference
Send this instruction to the server to request notifications of a particular event on a particular element.
- location: The element for which you require event notifications.
- arg: The type of event (see notes below).
- requestor: user value to be passed back to the client each time the requested event arises.
When requesting keyup or keydown events on a child iframe, the returned events always have a requestor value of zero. This is due to a limitation of event handling in the DOM model. keypress events remain within the iframe and don't propagate out to the parent client.