Find Browser Name & Version using Javascript

        var nVer = navigator.appVersion;

        var nAgt = navigator.userAgent;

        var browserName = navigator.appName;

        var fullVersion = '' + parseFloat(navigator.appVersion);

        var majorVersion = parseInt(navigator.appVersion, 10);

        var nameOffset, verOffset, ix;

        // In Opera, the true version is after "Opera" or after "Version"

        if ((verOffset = nAgt.indexOf("Opera")) != -1) {

            browserName = "Opera";

            fullVersion = nAgt.substring(verOffset + 6);

            if ((verOffset = nAgt.indexOf("Version")) != -1)

                fullVersion = nAgt.substring(verOffset + 8);

        }

        // In MSIE, the true version is after "MSIE" in userAgent

        else if ((verOffset = nAgt.indexOf("MSIE")) != -1) {

            browserName = "Microsoft Internet Explorer";

            fullVersion = nAgt.substring(verOffset + 5);

        }

        // In Chrome, the true version is after "Chrome"

        else if ((verOffset = nAgt.indexOf("Chrome")) != -1) {

            browserName = "Chrome";

            fullVersion = nAgt.substring(verOffset + 7);

        }

        // In Safari, the true version is after "Safari" or after "Version"

        else if ((verOffset = nAgt.indexOf("Safari")) != -1) {

            browserName = "Safari";

            fullVersion = nAgt.substring(verOffset + 7);

            if ((verOffset = nAgt.indexOf("Version")) != -1)

                fullVersion = nAgt.substring(verOffset + 8);

        }

        // In Firefox, the true version is after "Firefox"

        else if ((verOffset = nAgt.indexOf("Firefox")) != -1) {

            browserName = "Firefox";

            fullVersion = nAgt.substring(verOffset + 8);

        }

        // In most other browsers, "name/version" is at the end of userAgent

        else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) <

          (verOffset = nAgt.lastIndexOf('/'))) {

            browserName = nAgt.substring(nameOffset, verOffset);

            fullVersion = nAgt.substring(verOffset + 1);

            if (browserName.toLowerCase() == browserName.toUpperCase()) {

                browserName = navigator.appName;

            }

        }

        // trim the fullVersion string at semicolon/space if present

        if ((ix = fullVersion.indexOf(";")) != -1)

            fullVersion = fullVersion.substring(0, ix);

        if ((ix = fullVersion.indexOf(" ")) != -1)

            fullVersion = fullVersion.substring(0, ix);

        majorVersion = parseInt('' + fullVersion, 10);

        if (isNaN(majorVersion)) {

            fullVersion = '' + parseFloat(navigator.appVersion);

            majorVersion = parseInt(navigator.appVersion, 10);

        }

        document.write(''

 + 'Browser name  = ' + browserName + '<br>'

 + 'Full version  = ' + fullVersion + '<br>'

 + 'Major version = ' + majorVersion + '<br>'

 + 'navigator.appName = ' + navigator.appName + '<br>'

 + 'navigator.userAgent = ' + navigator.userAgent + '<br>'

)