// http://msdn.microsoft.com/ja-jp/library/bb979710(VS.95).aspx\r
this.duration = this[ '_rawObject' ][ 'NaturalDuration' ][ 'Seconds' ] * 1000;\r
this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );\r
// http://msdn.microsoft.com/ja-jp/library/bb979710(VS.95).aspx\r
this.duration = this[ '_rawObject' ][ 'NaturalDuration' ][ 'Seconds' ] * 1000;\r
this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );\r