function showProductImage1(id) {
  var elem = document.getElementById('productimage');
  if (elem) {
    elem.src = 'http://www.modelgroup.com/en/ancDBEditor_getBinaryData?tname=product_images&id=' + id + '&column=image&mimetype=image/jpeg';
  }
  var elem = document.getElementById('link1');
  if (elem) {
    elem.style.display = 'block';
  }
  var elem = document.getElementById('link2');
  if (elem) {
    elem.style.display = 'none';
  }
}

function showProductImage2(id) {
  var elem = document.getElementById('productimage');
  if (elem) {
    elem.src = 'http://www.modelgroup.com/en/ancDBEditor_getBinaryData?tname=product_images&id=' + id + '&column=image2&mimetype=image/jpeg';
  }
  var elem = document.getElementById('link1');
  if (elem) {
    elem.style.display = 'none';
  }
  var elem = document.getElementById('link2');
  if (elem) {
    elem.style.display = 'block';
  }
}