$(document).ready(function(){

      brand_position = 1;

      $("#bpht_left").click(function() {
          if (brand_position < 1) {
              return false;
          }
          $("#bpht_list"+brand_position).hide();
          if (brand_position == 1 ) {
              brand_position = 2;
          } else {
              brand_position--;
          }
          $("#bpht_list"+brand_position).fadeIn(900);
          return false;
      });
      $("#bpht_right").click(function() {
          if (brand_position > 2) {
              return false;
          }
          $("#bpht_list"+brand_position).hide();
          if (brand_position == 2 ) {
              brand_position = 1;
          } else {
              brand_position++;
          }
          $("#bpht_list"+brand_position).fadeIn(900);
          return false;
      });
  });