nts used for testing -->
        <div id="container">
            <div id="transition"></div>
        </div>

        <script>
            var transition = document.getElementById('transition');

            // syntax: none | [ all | <IDENT> ] [ ‘,’ [ all | <IDENT> ] ]*
            var values = {
                'none, all' : 'all',
                'all, none' : 'all',
                'foobar' : 'foobar',
                'all, foobar' : 'all, foobar',
                'foobar, all' : 'foobar, all',
     