Bootstrap 3 with jQuery Validation

application.js

$.validator.setDefaults({
    errorElement: "span",
    errorClass: "help-block",
    highlight: function (element, errorClass, validClass) {
        $(element).closest('.form-group').addClass('has-error');
    },
    unhighlight: function (element, errorClass, validClass) {
        $(element).closest('.form-group').removeClass('has-error');
    },
    errorPlacement: function (error, element) {
        if (element.parent('.input-group').length || element.prop('type') === 'checkbox' || element.prop('type') === 'radio') {
            error.insertAfter(element.parent());
        } else {
            error.insertAfter(element);
        }
    }
});

form.html

<div class="form-group">
    <div class="col-lg-12">
        <div class="checkbox">
            <label id="LabelConfirm" for="CheckBoxConfirm">
                <input type="checkbox" name="CheckBoxConfirm" id="CheckBoxConfirm" required="required" />
                This is the example input
            </label>
        </div>
    </div>
</div>