function setPicture(pic_index)
{
  var NewPictureURL = 'http://image.allmusic.com/00/amg/pic200/dr' + Pictures[pic_index].substr(0,2) + '00/' + Pictures[pic_index].substr(0,4) + '/' + Pictures[pic_index] + '.jpg';
  document.getElementById('Picture').src = NewPictureURL;
  if(Credits[pic_index])
  {
    var NewPictureCredits = 'Photo by <span>' + Credits[pic_index] + '</span>';
    document.getElementById('PictureCredits').style.visibility = "visible";
    document.getElementById('PictureCredits').innerHTML = NewPictureCredits;
  }
  else
  {
    document.getElementById('PictureCredits').style.visibility = "hidden";
  }
}

function nextPicture()
{
  pic_index++;
  if ( pic_index > Pictures.length - 1 ) { 
    pic_index = 0;
  }
  setPicture(pic_index);
}

function previousPicture()
{
  pic_index--;
  if ( i < 0 ) {
    pic_index = Pictures.length - 1;
  }
  setPicture(pic_index);
}

function randomPicture()
{
  pic_index = Math.floor(Math.random() * (Pictures.length));
  setPicture(pic_index);
}