This macro is used to switch between two or more stylesheets.
A live example is available on WebGUI.fr. Look at the upper right corner, you can see the links :'aA'. They are used here to enlarge the fonts used in the site.
This macro has been written for WebGUI 6.2 to use macro templates.
To get this macro for WebGUI 5.5 go to http://www.webgui.fr/telechargements.