function getAppClient(){ var ua = navigator.userAgent.toLowerCase(); if(ua.match(/MicroMessenger/i)=="micromessenger") { return "weixin"; } else if (ua.match(/QQ/i) == "qq") { return "QQ"; }else if(ua.match(/AlipayClient/i) == 'alipayclient'){ return "Alipay"; }else{ ... }
}