win/idl/nsIDOMBeforeUnloadEvent.idl

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#include "nsIDOMEvent.idl"

/**
 * The nsIDOMBeforeUnloadEvent interface is the interface for events
 * sent to handlers of the "beforeunload" event. This event is
 * non-standard. Interface derived from Microsoft IE's event
 * implementation.
 *
 * http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/events.asp
 *
 */

[scriptable, uuid(da19e9dc-dea2-4a1d-a958-9be375c9799c)]
interface nsIDOMBeforeUnloadEvent : nsIDOMEvent
{
  /**
   * Attribute used to pass back a return value from a beforeunload
   * handler
   */
           attribute DOMString          returnValue;
};