js判断用户的浏览设备是移动设备还是PC

 

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<script type="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) {         return true;       } else {         return false;       }     }       var flag = browserRedirect(); 　　if(flag){ 　　　　alert("phone"); 　　}else{ 　　　　alert("pc"); 　　}     </script>