using datepicker with different UI-theme than the rest of the site

using datepicker with different UI-theme than the rest of the site

Hello,

we want to style the datepicker, and only the datepicker, with an other ui-theme than the rest of the site.
We're using Liferay Portal 5.2.3, so the datepicker came along with the standard Liferay-Theme, but we don't want to change the whole back- and frontend-theme to our needs matching the site design.

Is there a way to call something like this:
$( ".mySelector" ).datepicker({ useThisTheme: 'myThemeName' });
to give the datepicker a different theme without applying it to the whole ui-elements in our site?

Thanks in advance for any helpful suggestions.