RadNotification provides the following client-side events:
OnClientShowing - fires just before RadNotification is shown. It can be canceled.
OnClientShown - fires after RadNotification is shown.
OnClientUpdating - fires just before RadNotification content is updated. It can be canceled.
OnClientUpdated - fires after RadNotification content is updated.
OnClientUpdateError - fires if an error was thrown when RadNotification content is updated. An error alert which can be canceled is displayed.
OnClientHiding - fires just before RadNotification hides.
OnClientHidden - fires after RadNotification hides.
If a Notification Menu is configured, it has its own client events as specified in the Client-Side Events article of RadContextMenu.