js判断访问的当前设备是手机还是电脑

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://m.xxx.com/";
　　} else {
　　　　window.location.href="http://www.xxxx.com/";
　　}　　　　
}
browserRedirect();