rem: return Sortable.sequence(element, arguments[1]).map( function(item) { return name + "[]=" + encodeURIComponent(item); }).join('&'); 
add:  if (options.tree) { return Sortable.tree(element, arguments[1]).children.map( function (item) { return [name + Sortable._constructIndex(item) + "=" + encodeURIComponent(item.id)].concat(item.children.map(arguments.callee)); }).flatten().join('&'); } else { return Sortable.sequence(element, arguments[1]).map( function(item) { return name + "[]=" + encodeURIComponent(item); }).join('&'); } 
context:   serialize: function(element) {    element = $(element);    var name = encodeURIComponent(      (arguments[1] && arguments[1].name) ? arguments[1].name : element.id);    return Sortable.sequence(element, arguments[1]).map( function(item) {      return name + "[]=" + encodeURIComponent(item);    }).join('&');  }
meta: 495	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/495/bb2276098a5a21c35e5ee72b3097bd9d7caa919f/dragdrop.js/buggy/actionpack/lib/action_view/helpers/javascripts/dragdrop.js