(function($){
  $.fn.addBorder = function(outColor,inColor) {
    return this.each(function() {
      return $(this).wrapInner( "<div class=\"border_out\"><div class=\"border_in\"></div></div>");
    });
  };
  
  $.fn.round = function() {
    return this.each( function() {
      $(this).append("<div class=\"rc rc_0\"></div>" 
        + "<div class=\"rc rc_1\"></div>" 
        + "<div class=\"rc rc_2\"></div>" 
        + "<div class=\"rc rc_3\"></div>"
      );
    }); 
  };
})(jQuery);