The first one only change the panel's title. The second one recreate the whole panel with a different title. If you only want to change the panel's title, please call 'setTitle' method instead.

good answer, thank you very much.

hi guys,
There are two ways to change the title of panel control.
1)
$("#aaa").panel('setTitle', 'new title');

2)
$("#aaa").panel({title: 'new title'}).

are there any differences? I prefer 2, but is the 1 correct way?

Thanks