in my code I used a table to sort.

var mySort = new Sortables($(’table’), {
onComplete: function() {
alert(this.serialize(function(el) {
return el.id;
}));
}
});

then after you sort your ‘table’ this will return a comma separated string of the id’s you had in your tr tags of your table.

This is rather basic, but it took me a while to figure out the basic syntax of this.