$(document).ready(function()
    {
        var menuHeight = ($('a.menu-item').size() * 60) + 1; // a menu item is 80px, menu spacer default height is 1px
        var pageHeight = $('#page-body').height() + $('#page-heading').height() + 24; // body padding is 12px
        
        if (pageHeight > menuHeight)
            $('#menu-spacer').css({height: (pageHeight - menuHeight + 1) + 'px'});
        else
            $('#page-body').css({height: (menuHeight - $('#page-heading').height()) - 24 + 'px'});
    });