You can take a look at the documentation about components visual customization: http://www.jboss.org/file-access/default/members/jbossrichfaces/freezone/docs/devguide/en/html/tabPanel.html#d0e59151
Probably someone from community will share his/her experience in implementing this.
i have already seen the documentation. i have set the background image of the tab but was not able to resize the image as per tab size which varies as per text size.
any pointer regarding the same would be a great help.
Make background image very long or use background-repeat CSS property.
i can't use background-repeat or long background image as my tab needs rounded top corner image. :(
Use several images with several HTML elements.