(function($) {
    $(function() {
        var sidebarHeight = $('.sidebar_b2b').outerHeight(true) - $('.sidebar_b2b .block-layered-nav .block-content').outerHeight(true);
        if($('#content').outerHeight(true) > $('.sidebar_b2b').outerHeight(true)) {
            var newHeight = $('#content').outerHeight(true) - sidebarHeight;
            $('.sidebar_b2b .block-layered-nav .block-content').height(newHeight);
        }
    });
})(jQuery);