1e133943_HTML_5__Preconditions
[Event name] emptied [Interface] Event [Dispatched when...] A media element whose networkState was previously not in the NETWORK_EMPTY state has just switched to that state (either because of a fatal error during load that's about to be reported, or because the load() method was invoked while the resource selection algorithm was already running, in which case it is fired synchronously during the load() method call). [Preconditions] 
networkState is NETWORK_EMPTY; all the DOM attributes are in their initial states.
HTML 5
Preconditions