I've found the cdn url for jquery ui js file here, but where can I found the theme css file in the cdn. I'm looking for the smoothness theme.
You can find the smoothness theme from google cdn in http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/themes/smoothness/jquery-ui.css.
The url is
http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/themes/< themename >/jquery-ui.css
where < themename > is the name of the theme you want.
The i18n file from cdn can be found in http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/i18n/jquery-ui-i18n.min.js