if (document.images)
{
  var img = new Image;

  img.src = "images/welcome.gif";
  img.src = "images/artists.gif";
  img.src = "images/songs.gif";
  img.src = "images/studio.gif";
  img.src = "images/press.gif";
  img.src = "images/contact.gif";
  img.src = "images/buy.gif";
  
}

function changeimg(img, name)
{
  if (document.images)
    document.images[name].src=img;
}