js判断是PC端还是移动端

#### 方案1："
function IsPC() {
 var userAgentInfo = navigator.userAgent;
 var Agents = ["Android", "iPhone",
 "SymbianOS", "Windows Phone",
 "iPad", "iPod"];
 var flag = true;
 for (var v = 0; v < Agents.length; v++) {
 if (userAgentInfo.indexOf(Agents[v]) > 0) {
 flag = false;
 break;
 }
 }
 return flag;
}
"

"
function browserRedirect() {
 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";
 if (!(bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) ){
 window.location.href=B页面;
 }
}
browserRedirect();
"

"
var browser_class = navigator.userAgent;
var browser_class_name1 = browser_class.match("Mobile");
var browser_class_name2 = browser_class.match("mobile");
var location_url = window.location.href;
if (browser_class_name1 != null || browser_class_name2 != null) {
 if (location_url.match("wap") == null) {
 window.location.href = "http://wap.xxxx.com";
 }
} else {
 if (location_url.match("3g") != null || location_url.match("wap") != null) {
 window.location.href = "http://wap.xxxx.com";
 }
}
"

"
function uaredirect(f) {
 try {
 if (document.getElementById("bdmark") != null) {
 return
 }
 var b = false;
 if (arguments[1]) {
 var e = window.location.host;
 var a = window.location.href;
 if (isSubdomain(arguments[1], e) == 1) {
 f = f + "/#m/" + a;
 b = true
 } else {
 if (isSubdomain(arguments[1], e) == 2) {
 f = f + "/#m/" + a;
 b = true
 } else {
 f = a;
 b = false
 }
 }
 } else {
 b = true
 }
 if (b) {
 var c = window.location.hash;
 if (!c.match("fromapp")) {
 if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|SymbianOS)/i))) {
 location.replace(f)
 }
 }
 }
 } catch(d) {}
}
function isSubdomain(c, d) {
 this.getdomain = function(f) {
 var e = f.indexOf("://");
 if (e > 0) {
 var h = f.substr(e + 3)
 } else {
 var h = f
 }
 var g = /^www\./;
 if (g.test(h)) {
 h = h.substr(4)
 }
 return h
 };
 if (c == d) {
 return 1
 } else {
 var c = this.getdomain(c);
 var b = this.getdomain(d);
 if (c == b) {
 return 1
 } else {
 c = c.replace(".", "\\.");
 var a = new RegExp("\\." + c + "$");
 if (b.match(a)) {
 return 2
 } else {
 return 0
 }
 }
 }
};
"

"
<SCRIPT type=text/javascript>uaredirect("手机站","WEB站");</SCRIPT>
"

"
//判断访问的设备信息
var ua = window.navigator.userAgent.toLowerCase();
if (ua.indexOf('android') != -1) {
 window.location = path + "/DownloadSoftWare/" + name + "/" + id+ "/";
} else if (ua.indexOf('iphone') != -1 || ua.indexOf('ipad') != -1) {
 window.top.location = "苹果官网";
} else if (ua.indexOf("Window NT")) {
 window.top.location = path + "/";
} else {
 alert("sorry，暂不支持您的系统下载！！");
}
"