JS如何判断是否为ie浏览器的方法(包括IE10、IE11在内)

function isIE(){
if (window.navigator.userAgent.indexOf("MSIE")>=1) 
return true; 
else 
return false; 
}

function isIE() { //ie?
 if (!!window.ActiveXObject || "ActiveXObject" in window)
  return true;
  else
  return false;
 }

function IEVersion() {
      var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串  
      var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1; //判断是否IE<11浏览器  
      var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge浏览器  
      var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1;
      if(isIE) {
          var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
          reIE.test(userAgent);
          var fIEVersion = parseFloat(RegExp["$1"]);
          if(fIEVersion == 7) {
              return 7;
          } else if(fIEVersion == 8) {
              return 8;
          } else if(fIEVersion == 9) {
              return 9;
          } else if(fIEVersion == 10) {
              return 10;
          } else {
              return 6;//IE版本<=7
          }   
      } else if(isEdge) {
          return 'edge';//edge
      } else if(isIE11) {
          return 11; //IE11  
      }else{
          return -1;//不是ie浏览器
      }
  }

function getBrowserInfo(){
        var ua = navigator.userAgent.toLocaleLowerCase();
        var browserType=null;
        if (ua.match(/msie/) != null || ua.match(/trident/) != null) {
            browserType = "IE";
            browserVersion = ua.match(/msie ([\d.]+)/) != null ? ua.match(/msie ([\d.]+)/)[1] : ua.match(/rv:([\d.]+)/)[1];
        } else if (ua.match(/firefox/) != null) {
            browserType = "火狐";
        }else if (ua.match(/ubrowser/) != null) {
            browserType = "UC";
        }else if (ua.match(/opera/) != null) {
            browserType = "欧朋";
        } else if (ua.match(/bidubrowser/) != null) {
            browserType = "百度";
        }else if (ua.match(/metasr/) != null) {
            browserType = "搜狗";
        }else if (ua.match(/tencenttraveler/) != null || ua.match(/qqbrowse/) != null) {
            browserType = "QQ";
        }else if (ua.match(/maxthon/) != null) {
            browserType = "遨游";
        }else if (ua.match(/chrome/) != null) {
            var is360 = _mime("type", "application/vnd.chromium.remoting-viewer");
            function _mime(option, value) {
                var mimeTypes = navigator.mimeTypes;
                for (var mt in mimeTypes) {
                    if (mimeTypes[mt][option] == value) {
                        return true;
                    }
                }
                return false;
            }
            if(is360){
                browserType = '360';
            }else{
                $('html').css("zoom",".80");
            }
        }else if (ua.match(/safari/) != null) {
            browserType = "Safari";
        }
}