var oldSong = "uno";
var oldInfoTrack = "uno";

function changeSong(idSong, aEle)
{
	if( idSong != oldSong )
	{
		var bkpHeight = $("#"+idSong).height();
		var oldSongBkp = oldSong;
		
		
		$("#"+oldSongBkp).fadeOut(550);
		
		var h = $("#content").height()
		
		$("#content").animate( {"height": h+"px"}, 550,
		
			function()
			{
				var size = $("#"+idSong).height() + 190;
				$("#content").animate( {"height": size+"px"}, 1100,
					function()
					{
						$("#"+idSong).fadeIn(800);
					}
				);
			}
		);
		
		$(".select").removeClass("select");
		$(aEle).addClass("select");
		
		oldSong = idSong;
	}
}


function changeTrack( track, info, aEle )
{
	$("#lettore").html("");
	so.addVariable("track", track);
	so.write("lettore");
	
	if( aEle != null )
	{
		$(".select").removeClass("select");
		$(aEle).addClass("select");
	}
	
	$("#info-"+oldInfoTrack).fadeOut(500, function(){ $("#info-"+info).fadeIn(500) } );
	
	
	
	oldInfoTrack = info;
}