Sortable demos not working

Sortable demos not working


The sortable demo in this link doesn't work. http://docs.jquery.com/UI/Sortables
I think the code is broken. Can someone please fix it?
FYI, This is the error message as seen in firebug:
array has no properties
inArray("li", undefined)core.js (line 1110)
click(Object type=mousedown target=li currentTarget=li)ui.mouse.js
(line 70)
(no name)()ui.mouse.js (line 57)
handle(Object type=mousedown target=li currentTarget=li)event.js (line
254)
(no name)()event.js (line 52)
Regards,
Deepak