js判断游览器是移动端还是PC端

js判断网页游览器是移动端还是PC端
 1    <script type="text/javascript">
 2         function browserRedirect() {
 3             var sUserAgent = navigator.userAgent.toLowerCase();
 4             var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
 5             var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
 6             var bIsMidp = sUserAgent.match(/midp/i) == "midp";
 7             var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
 8             var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
 9             var bIsAndroid = sUserAgent.match(/android/i) == "android";
10             var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
11             var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
12             //document.writeln("您的浏览设备为：");
13             if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
14                 // document.writeln("phone");
15                 alert("您的浏览设备为：移动端");
16             } else {
17                 alert("您的浏览设备为：pc");
18                // document.writeln("pc");
19             }
20         }
21 
22         browserRedirect();
23     </script>
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