YUI().use('sortable', function(Y) {

var sortable = new Y.Sortable({

container: '#demo',

nodes: 'em',

opacity: '.1'

});

// Incrementally change the color of items. This is purely visual for the example.

// It has no effect on the sort.

var color = 0;

Y.all('#demo em').each(function (v, k){

v.setStyle('backgroundColor', 'rgb(' + 100 + ',' + 20 + ',' + (color += 25) + ')' );

});

});