function slideshow(num)
{
  num = i + num;

  if ( ( num > 0 ) && ( num < slides.length ) )
  {
    i = num;
  }
  else
  {
    if ( num <= 0 )
    {
      num = slides.length - 1;
      i = slides.length - 1;
    }
    else if ( num == slides.length )
    {
      num = 0;
      i = 0;
    }
  }
  document.images.slide.src = "images/slides/" + slides[i] + ".gif";
}

function showslide()
{
  window.open("images/slides/" + slides[i] + ".jpg", "slide", "toolbar=no,status=no,menubar=no,scrollbars=yes,resizable=yes,directories=no,location=no,width=600,height=450");
}