Outdated Browser - Only show banner from IE8 and lower. Currently IE9 is included - browser

Question

I want this code to only display outdated browser from IE8 and lower. Currently it also shows a message for IE9, which I want to exclude. I did try to remove the IE9 part of the code from the lowerthan part of the code, but no luck.
I got the code from: https://github.com/burocratik/outdated-browser
/*!--------------------------------------------------------------------
JAVASCRIPT "Outdated Browser"
Version: 1.1.0 - 2014
author: Burocratik
website: http://www.burocratik.com
* #preserve
-----------------------------------------------------------------------*/
var outdatedBrowser = function(options) {
//Variable definition (before ajax)
var outdated = document.getElementById("outdated");
// Default settings
this.defaultOpts = {
bgColor: '#f25648',
color: '#ffffff',
lowerThan: 'transform',
languagePath: '../outdatedbrowser/lang/en.html'
}
if (options) {
//assign css3 property to IE browser version
if(options.lowerThan == 'IE8' || options.lowerThan == 'borderSpacing') {
options.lowerThan = 'borderSpacing';
} else if (options.lowerThan == 'IE9' || options.lowerThan == 'boxShadow') {
options.lowerThan = 'boxShadow';
} else if (options.lowerThan == 'IE10' || options.lowerThan == 'transform' || options.lowerThan == '' || typeof options.lowerThan === "undefined") {
options.lowerThan = 'transform';
} else if (options.lowerThan == 'IE11' || options.lowerThan == 'borderImage') {
options.lowerThan = 'borderImage';
}
//all properties
this.defaultOpts.bgColor = options.bgColor;
this.defaultOpts.color = options.color;
this.defaultOpts.lowerThan = options.lowerThan;
this.defaultOpts.languagePath = options.languagePath;
bkgColor = this.defaultOpts.bgColor;
txtColor = this.defaultOpts.color;
cssProp = this.defaultOpts.lowerThan;
languagePath = this.defaultOpts.languagePath;
} else {
bkgColor = this.defaultOpts.bgColor;
txtColor = this.defaultOpts.color;
cssProp = this.defaultOpts.lowerThan;
languagePath = this.defaultOpts.languagePath;
};//end if options
//Define opacity and fadeIn/fadeOut functions
var done = true;
function function_opacity(opacity_value) {
outdated.style.opacity = opacity_value / 100;
outdated.style.filter = 'alpha(opacity=' + opacity_value + ')';
}
// function function_fade_out(opacity_value) {
// function_opacity(opacity_value);
// if (opacity_value == 1) {
// outdated.style.display = 'none';
// done = true;
// }
// }
function function_fade_in(opacity_value) {
function_opacity(opacity_value);
if (opacity_value == 1) {
outdated.style.display = 'block';
}
if (opacity_value == 100) {
done = true;
}
}
//check if element has a particular class
// function hasClass(element, cls) {
// return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
// }
var supports = (function() {
var div = document.createElement('div'),
vendors = 'Khtml Ms O Moz Webkit'.split(' '),
len = vendors.length;
return function(prop) {
if ( prop in div.style ) return true;
prop = prop.replace(/^[a-z]/, function(val) {
return val.toUpperCase();
});
while(len--) {
if ( vendors[len] + prop in div.style ) {
return true;
}
}
return false;
};
})();
//if browser does not supports css3 property (transform=default), if does > exit all this
if ( !supports(''+ cssProp +'') ) {
if (done && outdated.style.opacity !== '1') {
done = false;
for (var i = 1; i <= 100; i++) {
setTimeout((function (x) {
return function () {
function_fade_in(x);
};
})(i), i * 8);
}
}
}else{
return;
};//end if
//Check AJAX Options: if languagePath == '' > use no Ajax way, html is needed inside <div id="outdated">
if( languagePath === ' ' || languagePath.length == 0 ){
startStylesAndEvents();
}else{
grabFile(languagePath);
}
//events and colors
function startStylesAndEvents(){
var btnClose = document.getElementById("btnCloseUpdateBrowser");
var btnUpdate = document.getElementById("btnUpdateBrowser");
//check settings attributes
outdated.style.backgroundColor = bkgColor;
//way too hard to put !important on IE6
outdated.style.color = txtColor;
outdated.children[0].style.color = txtColor;
outdated.children[1].style.color = txtColor;
//check settings attributes
btnUpdate.style.color = txtColor;
// btnUpdate.style.borderColor = txtColor;
if (btnUpdate.style.borderColor) btnUpdate.style.borderColor = txtColor;
btnClose.style.color = txtColor;
//close button
btnClose.onmousedown = function() {
outdated.style.display = 'none';
return false;
};
//Override the update button color to match the background color
btnUpdate.onmouseover = function() {
this.style.color = bkgColor;
this.style.backgroundColor = txtColor;
};
btnUpdate.onmouseout = function() {
this.style.color = txtColor;
this.style.backgroundColor = bkgColor;
};
}//end styles and events
// IF AJAX with request ERROR > insert english default
var ajaxEnglishDefault = '<h6>Your browser is out-of-date!</h6>'
+ '<p>Update your browser to view this website correctly. <a id="btnUpdateBrowser" href="http://outdatedbrowser.com/">Update my browser now </a></p>'
+ '<p class="last">×</p>';
//** AJAX FUNCTIONS - Bulletproof Ajax by Jeremy Keith **
function getHTTPObject() {
var xhr = false;
if (window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else if (window.ActiveXObject) {
try {
xhr = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
xhr = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
xhr = false;
}
}
}
return xhr;
};//end function
function grabFile(file) {
var request = getHTTPObject();
if (request) {
request.onreadystatechange = function() {
displayResponse(request);
};
request.open("GET", file, true);
request.send(null);
}
return false;
};//end grabFile
function displayResponse(request) {
var insertContentHere = document.getElementById("outdated");
if (request.readyState == 4) {
if (request.status == 200 || request.status == 304) {
insertContentHere.innerHTML = request.responseText;
}else{
insertContentHere.innerHTML = ajaxEnglishDefault;
}
startStylesAndEvents();
}
return false;
};//end displayResponse
////////END of outdatedBrowser function
};
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Outdated Browser</title>
<meta name="description" content="A time saving tool for developers. It detects outdated browsers and advises users to upgrade to a new version.">
<!-- Styles -->
<link rel="stylesheet" href="../outdatedbrowser/outdatedbrowser.min.css">
<link href='http://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
<style type="text/css">
body {
font-family: 'Open Sans', sans-serif; text-align: center;
background-color: #fafafa; color: #0a0a0a; line-height: 1.5em;
}
h1{font-size: 2.6em; line-height: 2em;}
h3, h4{line-height: 1em; margin: 2.5em 0 -.4em 0; text-transform: uppercase;}
h3 span, h4 span{text-transform: none;}
p{padding-bottom: 1em;}
p.designBy{position: absolute; bottom: 0; right: 1em; font-size: .8em;}
a {color: #0a0a0a;}
ul{list-style-type: none; padding: 0;}
</style>
</head>
<body>
<!-- ============= YOUR CONTENT ============= -->
<h1>Outdated Browser</h1>
<p>Remember: If you can't see the message, it's a good thing! You are using a modern browser :D</p>
<h3>DEFAULT properties but using jQuery (must support IE6+)</h3>
<p>bgColor: '#f25648', color: '#ffffff', lowerThan: 'transform' (<IE10), languagePath: 'your_path/outdatedbrowser/lang/en.html'</p>
<h3>What does it look like? <span>(it may differ in your tests) </span></h3>
<ul>
<li>IE7 - VISTA</li>
</ul>
<p class="designBy">by Bürocratik</p>
<!-- ============= Outdated Browser ============= -->
<div id="outdated"></div>
<!-- javascript includes -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
<script src="../outdatedbrowser/outdatedbrowser.js"></script>
<!-- plugin call -->
<script>
//USING jQuery
$(document).ready(function() {
outdatedBrowser({
bgColor: '#f25648',
color: '#ffffff',
lowerThan: 'transform',
languagePath: '../outdatedbrowser/lang/en.html'
})
})
console.log(outdatedBrowser);
</script>
</script>
</body>
</html>