JS判断访问设备是移动设备还是pc

<scripttype="text/javascript">
    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= 'http://url/mobile.html'; 
        } else { 
            window.location= 'http://url/pc.html'; 
        } 
    } 
    browserRedirect(); 
</script>