Button with id: btn-hideandshow.
Column on right has class: hide-and-show-box.

hide-and-show-box has display set to none.

<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script>
    $(document).ready(function() {
        $('#btn-hideandshow').click(function(e) {
            e.preventDefault();
            $('.hide-and-show-box').fadeToggle();
        });
    });
</script>