booklikes javascript

   <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
    </script>
    <script>

    $(document).ready(function() {
    $('.spoilertext').before('<a class="spoiler" href="#">[spoiler]</a>')
    $('.spoiler').click(function() {
        $(this).next('span').toggle();
    });
});
    </script>