把IOS ， 安卓的链接生成到同一张二维码

这个二维码指向这样一个链接：
http://daily.zhihu.com/download/

这个链接内容之主体是一段 JS 代码，用来判断客户端的系统，跳转到不同的地方，核心之代码如下：

function redirect(){location.href = href;}var url_parts = document.URL.split('?');var query = url_parts.length == 2 ? ('?' + url_parts[1]) : '';var href = '/';var ua = navigator.userAgent.toLowerCase();if (/iphone|ipad|ipod/.test(ua)) {href = 'https://itunes.apple.com/cn/app/id639087967?mt=8';__ga('set', 'page', '/download/ios' + query);__ga('send', 'pageview');__ga('send', 'event', 'app', 'download-via-qrcode', 'ios', {'hitCallback': redirect});setTimeout(redirect, 2000);} else if (/android/.test(ua)) {href = 'http://s.zhimg.com/daily/zhihu-daily-1.0.1.apk';__ga('set', 'page', '/download/android' + query);__ga('send', 'pageview');__ga('send', 'event', 'app', 'download-via-qrcode', 'android-local', {'hitCallback': redirect});setTimeout(redirect, 2000);} else if (/windows phone|blackberry/.test(ua)) {__ga('set', 'page', '/download/other' + query);__ga('send', 'pageview');alert('抱歉，暂不支持您的系统');location.href = '/';} else {__ga('send', 'pageview');location.href = '/';}})()