I use the Google API host to load my UI themes when a user loads my site. One of the user settings is that the theme to be used can be chosen from a list. Then in my pages I have the line:

 <link type="text/css" rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.0/themes/<?=$theme?>/jquery-ui.css" />

where $theme is the theme name. 

What I would like to know is how I can find out which of the themes are available for download from there. The default (smoothness) is as is choc-mint, but some of the other ones have vanished.

Thanks

John