How to extend a jquery ui widget ? (1.7)

Question

I would like to create a custom version of the sortable widget. I have been searching for documentation, but could not find something really accurate. The best information I

Answer 1

I used this one time:

$.ui.buttonset.prototype.value = function() {
     return this.element.find('#' + this.element.find('label[aria-pressed="true"]').attr('for')).val();
}