Develop Reference

IE Version Control JScript Html

We use IE version check in html JavaScript, it works well upto IE9 but no luck with IE10 & IE11
Could you please help me extend above so that it works on IE10 & IE11. Or perhaps bypass/ignore it entirely (Tried commenting no luck)
Thanks & Best Regards,
KSN

Try extracting MSIE from the UserAgent string
function msieversion() {
var ua = window.navigator.userAgent
var msie = ua.indexOf ( "MSIE " )
if ( msie > 0 ) // If Internet Explorer, return version number
return parseInt (ua.substring (msie+5, ua.indexOf (".", msie )))
else // If another browser, return 0
return 0
}

function load( ) {
valid_browser = false;
userAgent = navigator.userAgent;
i = userAgent.indexOf('Trident');
if (i != -1) {
valid_browser = true;
}

How to detect native browser with javascript on Samsung Galaxy S5 / S6

I'm aware it's a duplicate, but I tried the following:
How to detect the stock Android browser
var navU = navigator.userAgent;
// Android Mobile
var isAndroidMobile = navU.indexOf('Android') > -1 && navU.indexOf('Mozilla/5.0') > -1 && navU.indexOf('AppleWebKit') > -1;
// Apple webkit
var regExAppleWebKit = new RegExp(/AppleWebKit\/([\d.]+)/);
var resultAppleWebKitRegEx = regExAppleWebKit.exec(navU);
var appleWebKitVersion = (resultAppleWebKitRegEx === null ? null : parseFloat(regExAppleWebKit.exec(navU)[1]));
// Chrome
var regExChrome = new RegExp(/Chrome\/([\d.]+)/);
var resultChromeRegEx = regEhttps://www.quora.com/What-is-samsung-s5s-native-browser-Is-it-different-for-different-android-flavorsxChrome.exec(navU);
var chromeVersion = (resultChromeRegEx === null ? null : parseFloat(regExChrome.exec(navU)[1]));
// Native Android Browser
var isAndroidBrowser = isAndroidMobile && (appleWebKitVersion !== null && appleWebKitVersion < 537) || (chromeVersion !== null && chromeVersion < 37);
This doesn't work for above mentioned devices. I get false on Galaxy S5 / S6 native browser.
I also tried (Javascript detect android native browser):
var nua = navigator.userAgent;
var is_android = ((nua.indexOf('Mozilla/5.0') > -1 && nua.indexOf('Android ') > -1 && nua.indexOf('AppleWebKit') > -1) && !(nua.indexOf('Chrome') > -1));
This works, but also returns true for Chrome.
I'd like to improve on second piece of code so it returns true only for native browser, not chrome.
According to https://www.quora.com/What-is-samsung-s5s-native-browser-Is-it-different-for-different-android-flavors, S5 and S6 use a browser called "Internet". Is there a way to improve above snippet so it handles this browser as well?

There are lots of "Chromia" out there (as PPK shared here, mentioning HTC's and LG's as well as our Samsung Internet). Samsung Internet isn't the old "stock", a.k.a AOSP, Android browser, but our own Chromium-based browser.
I'm not sure what your intention is in trying to determine if it's Samsung Internet rather than Chrome (Perhaps analytics? Hopefully not for bug fixes?) but you may find this guide to our user agent strings here helpful:
http://developer.samsung.com/internet/user-agent-string-format

How to detect borwser in jQuery 1.11? [duplicate]

I use the following snip of a script:
if ($.browser.msie && $.browser.version < 9) {
extra = "?" + Math.floor(Math.random() * 3000);
}
It works fine with jQuery 1.8.3.
Now I updated jQuery to the new version 1.9.1 to use a new script.
Now I get the following error:
TypeError: Cannot read property 'msie' of undefined
I read the change log of the new jQuery version, but nothing should have changed
with msie
Any known bugs, tips or proposals?

Since $.browser is deprecated, here is an alternative solution:
/**
* Returns the version of Internet Explorer or a -1
* (indicating the use of another browser).
*/
function getInternetExplorerVersion()
{
var rv = -1; // Return value assumes failure.
if (navigator.appName == 'Microsoft Internet Explorer')
{
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
if (re.exec(ua) != null)
rv = parseFloat( RegExp.$1 );
}
return rv;
}
function checkVersion()
{
var msg = "You're not using Internet Explorer.";
var ver = getInternetExplorerVersion();
if ( ver > -1 )
{
if ( ver >= 8.0 )
msg = "You're using a recent copy of Internet Explorer."
else
msg = "You should upgrade your copy of Internet Explorer.";
}
alert( msg );
}
Source
However, the reason that its deprecated is because jQuery wants you to use feature detection instead.
An example:
$("p").html("This frame uses the W3C box model: <span>" +
jQuery.support.boxModel + "</span>");
And last but not least, the most reliable way to check IE versions:
// ----------------------------------------------------------
// A short snippet for detecting versions of IE in JavaScript
// without resorting to user-agent sniffing
// ----------------------------------------------------------
// If you're not in IE (or IE version is less than 5) then:
// ie === undefined
// If you're in IE (>=5) then you can determine which version:
// ie === 7; // IE7
// Thus, to detect IE:
// if (ie) {}
// And to detect the version:
// ie === 6 // IE6
// ie > 7 // IE8, IE9 ...
// ie < 9 // Anything less than IE9
// ----------------------------------------------------------
// UPDATE: Now using Live NodeList idea from #jdalton
var ie = (function(){
var undef,
v = 3,
div = document.createElement('div'),
all = div.getElementsByTagName('i');
while (
div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
all[0]
);
return v > 4 ? v : undef;
}());

$.browser was deprecated in version 1.3 and removed in 1.9
You can verify this by viewing the documentation.

For simple IE detection I tend to use:
(/msie|trident/i).test(navigator.userAgent)
Visit the Microsoft Developer Network to learn about the IE useragent:
http://msdn.microsoft.com/library/ms537503.aspx

The jQuery.browser options was deprecated earlier and removed in 1.9 release along with a lot of other deprecated items like .live.
For projects and external libraries which want to upgrade to 1.9 but still want to support these features jQuery have release a migration plugin for the time being.
If you need backward compatibility you can use migration plugin.

Update! Complete answer overhaul for new plugin!
The following plugin has been tested in all major browsers. It makes traditional use of userAgent string to re-equip jQuery.browser only if you're using jQuery version 1.9 or Greater!
It has the traditional jQuery.browser.msie type properties as well as a few new ones, including a .mobile property to help decide if user is on a mobile device.
Note: This is not a suitable replacement for feature testing. If you expect to support a specific feature on a specific device, it's still best to use traditional feature testing
/** jQuery.browser
* #author J.D. McKinstry (2014)
* #description Made to replicate older jQuery.browser command in jQuery versions 1.9+
* #see http://jsfiddle.net/SpYk3/wsqfbe4s/
*
* #extends jQuery
* #namespace jQuery.browser
* #example jQuery.browser.browser == 'browserNameInLowerCase'
* #example jQuery.browser.version
* #example jQuery.browser.mobile #returns BOOLEAN
* #example jQuery.browser['browserNameInLowerCase']
* #example jQuery.browser.chrome #returns BOOLEAN
* #example jQuery.browser.safari #returns BOOLEAN
* #example jQuery.browser.opera #returns BOOLEAN
* #example jQuery.browser.msie #returns BOOLEAN
* #example jQuery.browser.mozilla #returns BOOLEAN
* #example jQuery.browser.webkit #returns BOOLEAN
* #example jQuery.browser.ua #returns navigator.userAgent String
*/
;;(function($){var a=$.fn.jquery.split("."),b;for(b in a)a[b]=parseInt(a[b]);if(!$.browser&&(1<a[0]||9<=a[1])){a={browser:void 0,version:void 0,mobile:!1};navigator&&navigator.userAgent&&(a.ua=navigator.userAgent,a.webkit=/WebKit/i.test(a.ua),a.browserArray="MSIE Chrome Opera Kindle Silk BlackBerry PlayBook Android Safari Mozilla Nokia".split(" "),/Sony[^ ]*/i.test(a.ua)?a.mobile="Sony":/RIM Tablet/i.test(a.ua)?a.mobile="RIM Tablet":/BlackBerry/i.test(a.ua)?a.mobile="BlackBerry":/iPhone/i.test(a.ua)?
a.mobile="iPhone":/iPad/i.test(a.ua)?a.mobile="iPad":/iPod/i.test(a.ua)?a.mobile="iPod":/Opera Mini/i.test(a.ua)?a.mobile="Opera Mini":/IEMobile/i.test(a.ua)?a.mobile="IEMobile":/BB[0-9]{1,}; Touch/i.test(a.ua)?a.mobile="BlackBerry":/Nokia/i.test(a.ua)?a.mobile="Nokia":/Android/i.test(a.ua)&&(a.mobile="Android"),/MSIE|Trident/i.test(a.ua)?(a.browser="MSIE",a.version=/MSIE/i.test(navigator.userAgent)&&0<parseFloat(a.ua.split("MSIE")[1].match(/[0-9\.]{1,}/)[0])?parseFloat(a.ua.split("MSIE")[1].match(/[0-9\.]{1,}/)[0]):
"Edge",/Trident/i.test(a.ua)&&/rv:([0-9]{1,}[\.0-9]{0,})/.test(a.ua)&&(a.version=parseFloat(a.ua.match(/rv:([0-9]{1,}[\.0-9]{0,})/)[1].match(/[0-9\.]{1,}/)[0]))):/Chrome/.test(a.ua)?(a.browser="Chrome",a.version=parseFloat(a.ua.split("Chrome/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0])):/Opera/.test(a.ua)?(a.browser="Opera",a.version=parseFloat(a.ua.split("Version/")[1].match(/[0-9\.]{1,}/)[0])):/Kindle|Silk|KFTT|KFOT|KFJWA|KFJWI|KFSOWI|KFTHWA|KFTHWI|KFAPWA|KFAPWI/i.test(a.ua)?(a.mobile="Kindle",
/Silk/i.test(a.ua)?(a.browser="Silk",a.version=parseFloat(a.ua.split("Silk/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0])):/Kindle/i.test(a.ua)&&/Version/i.test(a.ua)&&(a.browser="Kindle",a.version=parseFloat(a.ua.split("Version/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0]))):/BlackBerry/.test(a.ua)?(a.browser="BlackBerry",a.version=parseFloat(a.ua.split("/")[1].match(/[0-9\.]{1,}/)[0])):/PlayBook/.test(a.ua)?(a.browser="PlayBook",a.version=parseFloat(a.ua.split("Version/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0])):
/BB[0-9]{1,}; Touch/.test(a.ua)?(a.browser="Blackberry",a.version=parseFloat(a.ua.split("Version/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0])):/Android/.test(a.ua)?(a.browser="Android",a.version=parseFloat(a.ua.split("Version/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0])):/Safari/.test(a.ua)?(a.browser="Safari",a.version=parseFloat(a.ua.split("Version/")[1].split("Safari")[0].match(/[0-9\.]{1,}/)[0])):/Firefox/.test(a.ua)?(a.browser="Mozilla",a.version=parseFloat(a.ua.split("Firefox/")[1].match(/[0-9\.]{1,}/)[0])):
/Nokia/.test(a.ua)&&(a.browser="Nokia",a.version=parseFloat(a.ua.split("Browser")[1].match(/[0-9\.]{1,}/)[0])));if(a.browser)for(var c in a.browserArray)a[a.browserArray[c].toLowerCase()]=a.browser==a.browserArray[c];$.extend(!0,$.browser={},a)}})(jQuery);
/* - - - - - - - - - - - - - - - - - - - */
var b = $.browser;
console.log($.browser); // see console, working example of jQuery Plugin
console.log($.browser.chrome);
for (var x in b) {
if (x != 'init')
$('<tr />').append(
$('<th />', { text: x }),
$('<td />', { text: b[x] })
).appendTo($('table'));
}
table { border-collapse: collapse; }
th, td { border: 1px solid; padding: .25em .5em; vertical-align: top; }
th { text-align: right; }
textarea { height: 500px; width: 100%; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<table></table>

Include jQuery migration plugin along with your jQuery library.

Using this:
if (navigator.userAgent.match("MSIE")) {}

You can detect the IE browser by this way.
(navigator.userAgent.toLowerCase().indexOf('msie 6') != -1)
you can get reference on this URL: jquery.browser.msie Alternative

You can use :
var MSIE = jQuery.support.leadingWhitespace; // This property is not supported by ie 6-8
$(document).ready(function(){
if (MSIE){
if (navigator.vendor == 'Apple Computer, Inc.'){
// some code for this navigator
} else {
// some code for others browsers
}
} else {
// default code
}});

Instead of having the whole migration script added, you could simply add the following (extracted from the migration script)
$.uaMatch = function( ua ) {
ua = ua.toLowerCase();
var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
/(webkit)[ \/]([\w.]+)/.exec( ua ) ||
/(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
/(msie) ([\w.]+)/.exec( ua ) ||
ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
[];
return {
browser: match[ 1 ] || "",
version: match[ 2 ] || "0"
};
};
and then use it like so
$.uaMatch(navigator.userAgent)

I had this problem as well. We were using two versions of Jquery (1.11.3 and 1.8.3), one of which was causing this issue. I found a lightbox_me.js release that worked on both versions:
http://buckwilson.me/lightboxme/
It was just an easy replacement of an old file.

How do I detect IE10 using javascript?

As many already posted in other questions (also in jQuery documentation), the old jQuery.browser.version is deprecated and works only in jquery1.3.
Do you know another simple way to detect it, that I can include in my code before:
function handleInfoDivPopupVisibility(dynamicEleId, staticEleId){
var parentContainer = $('headerSummaryContainer');
var dynamicEle = $(dynamicEleId);
var staticEle = $(staticEleId);
if(isIE() && parentContainer){
if (jQuery.browser.version != 10) { // I need to find a way to detect if it's IE10 here.
parentContainer.style.overflow = 'visible';
}
}
dynamicEle ? dynamicEle.style.display = '' : '';
if(dynamicEle && staticEle)
gui_positionBelow(dynamicEle, staticEle);
}
Before you say it's duplicated question of this or this, I'd like to reinforce that I don't want to use css hacks. Is there a way to detect it just as simple as I could do before?
if (jQuery.browser.version != 10) {...

In general it's a bad idea to check for browser version, it's considered a better practice to check for browser features. But if you're sure what you're doing:
function getIEVersion(){
var agent = navigator.userAgent;
var reg = /MSIE\s?(\d+)(?:\.(\d+))?/i;
var matches = agent.match(reg);
if (matches != null) {
return { major: matches[1], minor: matches[2] };
}
return { major: "-1", minor: "-1" };
}
var ie_version = getIEVersion();
var is_ie10 = ie_version.major == 10;
We have the following code in production, so it works and well-tested.
And yes, we did have a need to detect IE10, not just a particular feature that exists in IE10 but not in earlier versions.

Internet Explorer has the feature of Conditional Compilation (http://www.javascriptkit.com/javatutors/conditionalcompile.shtml). You can use this:
var isIE10 = false;
/*#cc_on
if (/^10/.test(#_jscript_version)) {
isIE10 = true;
}
#*/
alert(isIE10);
DEMO: http://jsfiddle.net/X3Rvz/1/
You can put this before all your JavaScript code, and from then on just reference isIE10.
The conditional compilation won't run in non-IE, so isIE10 will still be false. And #_jscript_version will only start with 10 in IE 10.
Conditional Comments aren't supported in IE 10, and the User-Agent string can be spoofed.
Since minification usually removes comments, you can use eval or Function to find out in a similar fashion:
var isIE10 = false;
if (Function('/*#cc_on return /^10/.test(#_jscript_version) #*/')()) {
isIE10 = true;
}
DEMO: http://jsfiddle.net/wauGa/2/
UPDATE:
To still avoid minification of comments but also combine detecting any version, you can use something like:
var IE = (function () {
"use strict";
var ret, isTheBrowser,
actualVersion,
jscriptMap, jscriptVersion;
isTheBrowser = false;
jscriptMap = {
"5.5": "5.5",
"5.6": "6",
"5.7": "7",
"5.8": "8",
"9": "9",
"10": "10"
};
jscriptVersion = new Function("/*#cc_on return #_jscript_version; #*/")();
if (jscriptVersion !== undefined) {
isTheBrowser = true;
actualVersion = jscriptMap[jscriptVersion];
}
ret = {
isTheBrowser: isTheBrowser,
actualVersion: actualVersion
};
return ret;
}());
And access the properties like IE.isTheBrowser and IE.actualVersion (which is translated from internal values of JScript versions).

The jQuery.browser.version still works but you have to include the jquery-migrate plugin.
http://api.jquery.com/jQuery.browser/
https://github.com/jquery/jquery-migrate/#readme

The IE10 User-Agent String says
However if your site is still using user-agent sniffing, then increasing the “MSIE” token to “10.0” is particularly noteworthy. Why? Because it adds an extra digit to the string value of the token. Most sites will handle this effortlessly, but some will process the extra digit incorrectly, causing them to identify IE10 as IE1.
To help illustrate, here’s a regular expression that only captures the first digit of the “MSIE” token’s value:
// INCORRECT: will report IE10 version in capture 1 as "1"
var matchIE = /MSIE\s(\d)/;
And here’s one that captures the full value of the “MSIE” token:
// Correct: will report IE10 version in capture 1 as "10.0"
var matchIE = /MSIE\s([\d.]+)/

Here is a one line solution to detect IE 10
var IE10 = navigator.userAgent.toString().toLowerCase().indexOf("trident/6")>-1;
and for more information on other version and browsers please refer this Link of Browser Detection

I Found myself having a issue (border radius on frameset with legend) with IE 9 through 11 (did not check IE 12)
MSIE is no long user agent in IE 11 and the appName is Mozilla, however trident is in there
I managed to extract the trident version # and detect it
if(navigator.appVersion.indexOf('Trident/')>-1){// Begin stupid IE crap
var IE=navigator.appVersion;
IE=IE.slice(IE.indexOf('Trident/')+8);
IE=IE.slice(0,IE.indexOf(';'));
IE=Number(IE);
if(IE>=5&&IE<=7) // IE 9 through IE 11
document.body.className='ie';
}

How can I determine which version of IE a user is running in JavaScript?

In some existing code there is a test to see if the user is running IE, by checking if the object Browser.Engine.trident is defined and returns true.
But how can I determine if the user is running IE6 (or earlier) or IE7 (or later)?
The test is needed inside a JavaScript function so a conditional comment doesn't seem suitable.

From detecting Internet Explorer More Effectively at msdn:
function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
var rv = -1; // Return value assumes failure.
if (navigator.appName == 'Microsoft Internet Explorer')
{
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
if (re.exec(ua) != null)
rv = parseFloat( RegExp.$1 );
}
return rv;
}
function checkVersion()
{
var msg = "You're not using Internet Explorer.";
var ver = getInternetExplorerVersion();
if ( ver > -1 )
{
if ( ver >= 6.0 )
msg = "You're using a recent copy of Internet Explorer."
else
msg = "You should upgrade your copy of Internet Explorer.";
}
alert( msg );
}

If you really want to be sure you are using IE and a specific version then you could obviously use IE's conditional tags to only run certain code within IE. It's not really that pretty but at least you can be sure that it is really IE and not some spoofed version.
<script>
var isIE = false;
var version = -1;
</script>
<!--[if IE 6]>
<script>
isIE = true;
version = 6
</script>
<![endif]-->
<!--[if IE 7]>
<script>
isIE = true;
version = 7
</script>
<![endif]-->
It's pretty self explanatory. In IE6 isIE is true and version is 6, In IE7 isIE is true and version is 7 otherwise isIE is false and version is -1
Alternatively you could just roll your own solution using code plagarised from jQuery.
var userAgent = navigator.userAgent.toLowerCase();
var version = (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
var isIE = /msie/.test( userAgent ) && !/opera/.test( userAgent ),

If you are already using jQuery in a pre-1.9 version AND you don't need to detect IE 11, you can do this:
if (jQuery.browser.msie == true) {
if (jQuery.browser.version == 7.0)
// .. do something for 7.0
else
// .. do something for < 7.0
}

The Navigator object contains all the information about the user's browser:
eg:
var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);
See:
http://www.w3schools.com/js/js_browser.asp

If you are checking for a certain functionality, you should check for it directly, e.g. if (window.focus) {window.focus();} Browser detection is never reliable enough.
For more details on object vs browser detection, check out this article at Quirksmode.
On the other hand, if the feature you need IS the browser type and version, e.g. for statistical purposes, go with navigator.appName and navigator.appVersion. (Beware though - many less popular browsers masquerade themselves as MSIE 6 or 7, as certain sites block anything that's not IE on the premise that "all the modern browsers are IE, right?" (hint: not anymore).)

So IE8 compatibility view mode reports itself as IE7 even though it doesn't always behave the same. And for that, I give you this monster:
// IE8's "Compatibility mode" is anything but. Oh well, at least it doesn't take 40 lines of code to detect and work around it.
// Oh wait:
/*
* Author: Rob Reid
* CreateDate: 20-Mar-09
* Description: Little helper function to return details about IE 8 and its various compatibility settings either use as it is
* or incorporate into a browser object. Remember browser sniffing is not the best way to detect user-settings as spoofing is
* very common so use with caution.
*/
function IEVersion(){
var _n=navigator,_w=window,_d=document;
var version="NA";
var na=_n.userAgent;
var ieDocMode="NA";
var ie8BrowserMode="NA";
// Look for msie and make sure its not opera in disguise
if(/msie/i.test(na) && (!_w.opera)){
// also check for spoofers by checking known IE objects
if(_w.attachEvent && _w.ActiveXObject){
// Get version displayed in UA although if its IE 8 running in 7 or compat mode it will appear as 7
version = (na.match( /.+ie\s([\d.]+)/i ) || [])[1];
// Its IE 8 pretending to be IE 7 or in compat mode
if(parseInt(version)==7){
// documentMode is only supported in IE 8 so we know if its here its really IE 8
if(_d.documentMode){
version = 8; //reset? change if you need to
// IE in Compat mode will mention Trident in the useragent
if(/trident\/\d/i.test(na)){
ie8BrowserMode = "Compat Mode";
// if it doesn't then its running in IE 7 mode
}else{
ie8BrowserMode = "IE 7 Mode";
}
}
}else if(parseInt(version)==8){
// IE 8 will always have documentMode available
if(_d.documentMode){ ie8BrowserMode = "IE 8 Mode";}
}
// If we are in IE 8 (any mode) or previous versions of IE we check for the documentMode or compatMode for pre 8 versions
ieDocMode = (_d.documentMode) ? _d.documentMode : (_d.compatMode && _d.compatMode=="CSS1Compat") ? 7 : 5;//default to quirks mode IE5
}
}
return {
"UserAgent" : na,
"Version" : version,
"BrowserMode" : ie8BrowserMode,
"DocMode": ieDocMode
}
}
var ieVersion = IEVersion();
var IsIE8 = ieVersion.Version != "NA" && ieVersion.Version >= 8;

This is probably going to get voted down, because it's not directly answering the question, but... You should not be writing browser-specific code. There's very little you can't do while coding for most widely-accepted browsers.
EDIT: The only time I found it useful to have conditional comments was when I needed to include ie6.css or ie7.css.

Well... here is what I came up after thinking for a while. just wanted to find a simple solution.
if (navigator.appName == 'Microsoft Internet Explorer') {
// Take navigator appversion to an array & split it
var appVersion = navigator.appVersion.split(';');
// Get the part that you want from the above array
var verNumber = appVersion[1];
alert(verNumber);
}
It returns ex:- MSIE 10.0, MSIE 9.0, MSIE 8.0
further extend, if you want to check if it's "lower than" or "greater than" IE version, you can slightly modify
if (navigator.appName == 'Microsoft Internet Explorer') {
var appVersion = navigator.appVersion.split(';');
var verNumber = appVersion[1];
// Reaplce "MSIE " from the srting and parse it to integer value
var IEversion = parseInt(verNumber.replace('MSIE ', ''));
if(IEversion <= 9){
alert(verNumber);
}
}
got the base idea from w3schools, hope this will help some one... :D

This is the script I use and it seems to work well enough:
// Returns 0 if the browser is anything but IE
function getIEVersion() {
var ua = window.navigator.userAgent;
var ie = ua.indexOf("MSIE ");
return ((ie > 0) ? parseInt(ua.substring(ie+5, ua.indexOf(".", ie))) : 0);
}
Hope that helps someone...

This should give you more details than you'll want:
var agent = navigator.userAgent;
var msiePattern = /.*MSIE ((\d+).\d+).*/
if( msiePattern.test( agent ) ) {
var majorVersion = agent.replace(msiePattern,"$2");
var fullVersion = agent.replace(msiePattern,"$1");
var majorVersionInt = parseInt( majorVersion );
var fullVersionFloat = parseFloat( fullVersion );
}

As no-one seems to have said it yet:
The test is needed inside a JavaScript function so a conditional comment doesn't seem suitable.
You can easily put a conditional comment — a JScript conditional comment, not an HTML one — inside a function:
function something() {
var IE_WIN= false;
var IE_WIN_7PLUS= false;
/*#cc_on
#if (#_win32)
IE_WIN= true;
#if (#_jscript_version>=5.7)
IE_WIN_7PLUS = true;
#end
#end #*/
...
}
It's more typical to do the test once at global level though, and just check the stored flags thereafter.
CCs are more reliable than sifting through the mess that the User-Agent string has become these days. String matching methods on navigator.userAgent can misidentify spoofing browsers such as Opera.
Of course capability sniffing is much better for cross-browser code where it's possible, but for some cases — usually bug fix workarounds — you do need to identify IE specifically, and CCs are probably the best way to do that today.

<script>
alert("It is " + isIE());
//return ie number as int else return false
function isIE() {
var myNav = navigator.userAgent.toLowerCase();
if (myNav.indexOf('msie') != -1) //ie less than ie11 (6-10)
{
return parseInt(myNav.split('msie')[1]);
}
else
{
//Is the version more than ie11? Then return false else return ie int number
return (!!(myNav.match(/trident/) && !myNav.match(/msie/)) == false)?false : parseInt(myNav.split('rv:')[1].substring(0, 2));
}
}
</script>