gistfile1.txt

var add_image_handlers = function() {

  $('ul.thumbnails li').eq(0).addClass('selected'); 
  $('ul.thumbnails li a').click(function() {
    $("#main-image").data('selectedThumb', $(this).attr('href'));
    $('ul.thumbnails li').removeClass('selected');
    $(this).parent('li').addClass('selected'); 
    return false;
  }).hover(
          function() {
            $('#main-image img').attr('src', $(this).attr('href').replace('mini', 'product'));
          },
          function() {
            $('#main-image img').attr('src', $("#main-image").data('selectedThumb'));
          }
          );

 $("#main-image").data('selectedThumb',$('#variant-thumbnails li a').eq(0).attr("href"));
};