function resizeProductImage()
   {
      var imgObj = document.getElementById('productImage');
      var height =$(document).height();
      var width = $(document).width();
      var origHeight = imgObj.height;
      var origWidth = imgObj.width;
      
      if ( width < 800 )
      {
         imgObj.width = origWidth * (2/3); 
         imgObj.height = origHeight * (2/3);;
      }
   }