I am trying to achieve themes on my richfaces web application.

Currently I am using the same copy of css file for both the themes with slight of color changes.

But when I click on theme 2, my <rich:dropDownMenu> collapses even though its using same css properties as Theme 1. Can anyone help me to figure out why I am facing this issue ?

Is reset.css causing this or do I need to make any changes for theme2.css ?