Disable button if checkbox is not checked

            <input type="checkbox" name="one" id="one"/>
            <label for="one">I have read and I accept the terms and conditions</label>
            <br />

<div class="col-sm-12">
            <button type="submit" name="btnnext" id="btnnext" class="btn btn-primary btn-primary">Next<span class="glyphicon glyphicon-chevron-right"></span></button>
        </div>

<script type="text/javascript">
        var checkBoxes = $('one');
        checkBoxes.change(function () {
        $('#btnnext').prop('disabled', checkBoxes.filter(':checked').length < 1);
        });
        checkBoxes.change();
    </script>