New code Js check version browser Internet Explorer

Js check version Internet Explorer. After browser update, old code check version is not apply in jQuery or Javasccript. Because, I was search and see a result is good. I’m using to projects in company and this is perfect.

This is new code check version of Internet Explorer:

/* check version ie9+ */
if (navigator.appName == "Microsoft Internet Explorer") {
    ie = true;
    //Create a user agent var
    var ua = navigator.userAgent;
    //Write a new regEx to find the version number
    var re = new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})");
    //If the regEx through the userAgent is not null
    if (re.exec(ua) != null) {
        //Set the IE version
        ieVersion = parseInt(RegExp.$1);
        if(ieVersion == 8){
            //action with ie 8
        }
        if(ieVersion == 9){
            //action with ie 9
        }
        if(ieVersion == 10){
            //action with ie 10
        }
    }
} else {
    if (navigator.appName == 'Netscape') {
        ie = true;
        var ua = navigator.userAgent;
        var re  = new RegExp("Trident/.*rv:([0-9]{1,}[\.0-9]{0,})");
        if (re.exec(ua) != null)
        {
            ieVersion = parseInt( RegExp.$1 );
            if(ieVersion == 11){
                //action with ie 11
            }
        }
    }
}