function CollapseImage() {
  document.getElementById('objImagePanel').style.display = 'none';
  document.getElementById('objGalleryPanel').style.display = '';
}

function ExpandImage(intImageIndex, strFileName) {
  document.getElementById('objPortfolioImage').src = strFileName;
  document.getElementById('objImageIndex').innerHTML = intImageIndex;
  document.getElementById('objGalleryPanel').style.display = 'none';
  document.getElementById('objImagePanel').style.display = '';
}

function NextImage() {
  var arrAnchors = document.getElementById('objPortfolioGallery').getElementsByTagName('A');
  var intImageIndex = parseInt(document.getElementById('objImageIndex').innerHTML);
  intImageIndex++;
  if (intImageIndex >= arrAnchors.length)
    intImageIndex = 0;
  eval(unescape(arrAnchors[intImageIndex].href));
}

function PreviousImage() {
  var arrAnchors = document.getElementById('objPortfolioGallery').getElementsByTagName('A');
  var intImageIndex = parseInt(document.getElementById('objImageIndex').innerHTML);
  intImageIndex--;
  if (intImageIndex < 0)
    intImageIndex = arrAnchors.length - 1;
  eval(unescape(arrAnchors[intImageIndex].href));
}