判断手机端

var from = ''
        if (from != 'wap') {
            var userAgentInfo = navigator.userAgent;
            console.log(userAgentInfo);
            if (userAgentInfo.indexOf("Android") > 0 || userAgentInfo.indexOf("iPhone") > 0 || userAgentInfo.indexOf("iPad") > 0 || userAgentInfo.indexOf("Windows Phone") > 0 || userAgentInfo.indexOf("iPod") > 0 || userAgentInfo.indexOf("UCBrowser") > 0) {
                window.location.href = "m/index.html";
            }
        }