// --------------------------------------------------------------------------
// image controls
// --------------------------------------------------------------------------


function changeDirection(direction){
  if (!currentIndex) currentIndex = 0
  if (imageArray && numberArray && imageArray.length == numberArray.length){
    currentIndex = currentIndex + direction
    if (currentIndex > imageArray.length-1) currentIndex = 0
    if (currentIndex < 0) currentIndex = imageArray.length-1
    if (document.getElementById){
      document.getElementById('number').innerHTML = ((currentIndex+1) + ' of ' + numberArray.length + ' ' + numberArray[currentIndex])
      document.getElementById('image').src = path + imageArray[currentIndex] + '.jpg';
    }
  }
  
}