Делаем кнопку неактивной при клике по чекбоксу

HTML

<script src="https://dimox.github.io/jQueryFormStyler/dist/jquery.formstyler.js"></script>
<link rel="stylesheet" href="https://dimox.github.io/jQueryFormStyler/dist/jquery.formstyler.css">
<link rel="stylesheet" href="https://dimox.github.io/jQueryFormStyler/dist/jquery.formstyler.theme.css">
<input type="checkbox" class="termsCheck">

<br><br>

<input type="submit" value="Кнопка" class="formOrderSubmit">

CSS

* {padding: 0; margin: 0}
body {padding: 50px}
.formOrderSubmit {padding: 5px 10px;}

JavaScript

(function($) {
$(function() {

   // $('input, select').styler();

    $('input.termsCheck').on('change', function() {
        if ($(this).is(':checked')) {
            $(".formOrderSubmit").attr("disabled","disabled");  
        } else {
            $(".formOrderSubmit").removeAttr("disabled");
        }
    });

})
})(jQuery)