var iphoneTest = navigator.userAgent.indexOf("iPhone") != -1;
var ipodTest = navigator.userAgent.indexOf("iPod") != -1;
var ipadTest = navigator.userAgent.indexOf("iPad") != -1;
if (iphoneTest || ipodTest || ipadTest) {
    document.write('<style type="text/css">.sf-menu li.last{width:105px;}</style>');
}