Already answered a similar questions at jquery ui - how to use google CDN
You can make the call using
You can also load jQuery from Microsoft CDN at
You can also link to other Ui themes by changes the name of the theme. In This case change the name base to any other theme name /base/jquery-ui.css to any other theme.
Check out the jQuery UI Blog for a link of all CDN links http://blog.jqueryui.com/
If you want to revert back to your host in case Google failed, you can do
