.siteNavigation ul.jd_menu li { margin-right:5px; }

*:first-child+html .siteNavigation ul.jd_menu li { margin-right:3px; }
*:first-child+html .siteNavigation ul.jd_menu a { padding-left:8px; padding-right:8px; }

*html .siteNavigation ul.jd_menu li { margin-right:3px; }
*html .siteNavigation ul.jd_menu a { padding-left:8px; padding-right:8px; }