var adv_effects = new Array();

function adv_fadeOutAll()
{
	i = 1;
	while( document.getElementById('adv_img' + i) )
	{
		if(adv_effects[i] != null)
			adv_effects[i].cancel();
		
		adv_effects[i] = new Effect.Opacity('adv_img'+i, {duration:2.0, to:0});
		i++;
	}
}

function adv_fadeOut( id )
{
	if(adv_effects[id] != null)
		adv_effects[id].cancel();
		
	adv_effects[id] = new Effect.Opacity('adv_img'+id, {duration:0.5, to:0});
}

function adv_fadeIn( id )
{
	if(adv_effects[id] != null)
		adv_effects[id].cancel();
		
	adv_effects[id] = new Effect.Opacity('adv_img'+id, {duration:0.5, to:1});
}