Generates links that allow users to select up to five different styles for the website according to their preferences. The selected settings are stored in a browser cookie.
When a user chooses a style, the web part adds the specified CSS class to the class attribute of the BODY tag. This way, you can configure the web part to style any element found on the website's pages.
Help URL: http://devnet.kentico.com/docs/webparts/index.html?CSSStyleSelector_overview.htm