function Atualiza_Slider() {
	valor_opacidade = (MediaPlayer.volume - (-10000)) / 100 
	slider.filters.alpha.opacity = valor_opacidade;
}

function onStopPlayer() {
	MediaPlayer.Stop();
}

function onPlayPlayer() {
	MediaPlayer.Play();
}

function onPause() {
	if(MediaPlayer.PlayState==1)
		MediaPlayer.Play();
	else if (MediaPlayer.PlayState==2)
		MediaPlayer.Pause();
}

function onVolumeUp() {
	if (MediaPlayer.Volume <= -300) 
		MediaPlayer.Volume = MediaPlayer.Volume + 300;
}

function onVolumeDown() {
	if (MediaPlayer.Volume >= -8000) 
		MediaPlayer.Volume = MediaPlayer.Volume - 300;
}