JS判断请求来自Android手机还是iPhone手机，根据不同的手机跳转到不同的链接。

        function bs (){

            var browser = {

                versions: function () {

                    var u = navigator.userAgent, app = navigator.appVersion;

                        return { //移动终端浏览器版本信息

                            ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端

                            android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或uc浏览器

                            iPhone: u.indexOf('iPhone') > -1, //是否为iPhone或者QQHD浏览器

                            iPad: u.indexOf('iPad') > -1, //是否iPad

                        };

                    }(),

                }

            if (browser.versions.iPhone || browser.versions.iPad || browser.versions.ios) {

                $("header .btn a").html("ios终端开通包月会员");

                $("header .btn a").attr("target","");

            }

            if (browser.versions.android) {

                $("header .btn a").html("仅需9元开通包月会员");

            }

        }