<script>
YUI().use('node', function(Y){
    var boxes = Y.all('.box-row li');

    var handleBoxClick = function(e) {
        // boxes is a NodeList
        boxes.setHTML('neener');
        boxes.setStyle('backgroundColor', '#F4E6B8');
    
        // e.currentTarget === .box-row li, just the one that was clicked
        e.currentTarget.setHTML('ouch!');        
        e.currentTarget.setStyle('backgroundColor', '#C4DAED');
    };    
    Y.one('.box-row').delegate('click', handleBoxClick, 'li');
});
</script>
