return audio.playlist_index; 
return audio.proxy.playlist_index_get(); 
function hop_audio_playlist_index( audio ) {   return audio.playlist_index;}
4636	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4636/646b66df1861b02e03f9c899c29987b6af48a42f/hop-audio.js/buggy/share/hop-audio.js