//===========文件浏览================
import flash.net.FileReference;
var FR:FileReference = new FileReference();
function onSelect(file:FileReference):Void {
trace(file.name);
}
FR.addListener(this);
_btn.onPress = function() {
FR.browse();
};
//声音插入完成会触发onSoundComplete事件
_sound.onSoundComplete = function() {
gotoAndPlay()
};