监测是移动端还是pc端

       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)) {
                    // alert("当前是电脑打开")
                }else{
                    // alert("当前是手机打开")
                }