Js验证userAgent是否来自手机端

function GetQueryString(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
    var r = window.location.search.substr(1).match(reg);
    if (r != null) return (r[2]); return null;
}
var openId = GetQueryString("openId");
var index = GetQueryString("index");
function IsWapPage() {
    var sUserAgent = navigator.userAgent.toLowerCase();
    var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
    var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
    var bIsMidp = sUserAgent.match(/midp/i) == "midp";
    var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
    var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
    var bIsAndroid = sUserAgent.match(/android/i) == "android";
    var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
    var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
    var bIsWP = sUserAgent.match(/windows phone/i) == "windows phone";
    //var IsWap = (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM || bIsWP);
    //return IsWap;
    if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM || bIsWP) {
        switch (index) {
            case "Authorization": window.location.href = "Authorization.html?openId=" + openId; break;
            case "ReportExcption": window.location.href = "ReportExcption.html?openId=" + openId; break;
            case "ExcptionDetails": window.location.href = "ReportRecord.html?openId=" + openId; break;
            default: break;
        }
    } else {
        window.location.href = "ErrorWarning.html";
    }
}