: error = '''asi.addStateListener'''(asiStateCallback [, object]) - Registers an ASI state-change listener callback. The registration of multiple listener callbacks at the same time is supported. Registered listener callbacks can be removed by calling removeStateListener. | : error = '''asi.addStateListener'''(asiStateCallback [, object]) - Registers an ASI state-change listener callback. The registration of multiple listener callbacks at the same time is supported. Registered listener callbacks can be removed by calling removeStateListener. |