function toggleProductRatings()
{
  elm = document.getElementById('product-rating-area');
  control = document.getElementById('product-rating-area-show-hide');
  if (elm.style.display == 'none')
  {
    elm.style.display = 'block';
    control.innerHTML = '<a href="javascript:toggleProductRatings()">Hide Product Reviews</a>';
  }
  else
  {
    elm.style.display = 'none';
    control.innerHTML = '<a href="javascript:toggleProductRatings()">Show Product Reviews</a>';
  }
}