var xitong; checkSystem() function checkSystem() { var u = window.navigator.userAgent, app = window.navigator.appVersion; var isAndroid = u.indexOf(‘Android‘) > -1 || u.indexOf(‘Linux‘) > -1; //g var isIOS = !!u.match(/(i[^;] ;( U;)? CPU. Mac OS X/); //ios终端 if (isAndroid) { xitong= "android" } if (isIOS) { xitong ="ios"; } };