Hello, Rikard.
I upgraded it already :)

Thank you, Vinay.

Yeah, I and the client know that less than 2% users use IE9, but his clients(he owns b2b business) are old Koreans (I’m young Korean. haha) so that they use IE9 or older version of IE and they don’t try to update it. Korean usage of IE9 is more than 5%, it depend on ages.

Anyway, I paste code below. Not only “Compatibility mode”, when I enter F12, the site shows contents normally like IE10+, so I Googled [ie9 javascript doesn’t work but debug]. Then I found an code example on stackoverflow.

Thanks again, Vinay and , Basilis !!!

<!–[if IE 9]>
<script type=”text/javascript”>
if (!window.console) (function() {

var __console, Console;

Console = function() {
var check = setInterval(function() {
var f;
if (window.console && console.log && !console.__buffer) {
clearInterval(check);
f = (Function.prototype.bind) ? Function.prototype.bind.call(console.log, console) : console.log;
for (var i = 0; i < __console.__buffer.length; i++) f.apply(console, __console.__buffer[i]);
}
}, 1000);

function log() {
this.__buffer.push(arguments);
}

this.log = log;
this.error = log;
this.warn = log;
this.info = log;
this.__buffer = [];
};

__console = window.console = new Console();
})();

</script>

Hello, Basilis. Thanks for your reply.
But only few IE9 users set “compatibility mode” as default. Enfold demo site shows Layerslider well even on IE9 default mode(I didnt use compatibility mode before). So there is a difference something. jQuery version? Some declaration with meta tag?