var i = 0;
  
  var button = new Array();
  for (var i = 0; i <= 3; i++)
  {
    button[i] = new Array();
  }

  button[0][0] = new Image();
  button[0][0].src = "images/wmp_off.jpg";

  button[0][1] = new Image();
  button[0][1].src = "images/wmp_on.jpg";

  button[1][0] = new Image();
  button[1][0].src = "images/winamp_off.jpg";

  button[1][1] = new Image();
  button[1][1].src = "images/winamp_on.jpg";

  button[2][0] = new Image();
  button[2][0].src = "images/realplayer_off.jpg";

  button[2][1] = new Image();
  button[2][1].src = "images/realplayer_on.jpg";

  button[3][0] = new Image();
  button[3][0].src = "images/itunes_off.jpg";

  button[3][1] = new Image();
  button[3][1].src = "images/itunes_on.jpg";




function ChangeButton(nbr, x)
{

  switch(nbr)
  {
    case 1:
	  //alert("Hilfe");
      document.images["button01"].src = button[0][x].src;
	  break;
    case 2:
      document.images["button02"].src = button[1][x].src;
	  break;
    case 3:
      document.images["button03"].src = button[2][x].src;
	  break;
    case 4:
      document.images["button04"].src = button[3][x].src;
	  break;
	}
}