https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2009/10/15/how-to-use-jqueryui-tabs-in-right-to-left-layout.aspxQuoting from Joe Audette 's (main author of the superb opensouce mojoPortal CMS for ASP.net ) blog: ...you include the normal css for the jquery ui theme, and you add another css file below it in the page (it must be lower in the page in order to overrideelCommunityServer 2.1 SP3 (Build: 20423.1)