// change size of clicked element

      $container.delegate( '.element', 'click', function(){

        $(this).toggleClass('large');

        $container.isotope('reLayout');

      });

      // toggle variable sizes of all elements

      $('#toggle-sizes').find('a').click(function(){

        $container

          .toggleClass('variable-sizes')

          .isotope('reLayout');

        return false;

      });