$(function() {
    $('.inner-page').each(function() {
        var page_height = $(this).height();
        var sidebar_height = $('#left_nav_wrap').height();
        if(page_height < sidebar_height && sidebar_height > 200 ) {
            var height_diff = sidebar_height - 260;
            $('#footer_top_spacer').css({height: height_diff + 30 + 'px'});
        }
    });
});