[xwiki-users] Syntax and execution rules for parsed CSS and Javascript objects

I'm trying to move all velocity macro customizations from files to the database according to http://platform.xwiki.org/xwiki/bin/view/DevGuide/SkinExtensionsTutorial Though I can't find out syntax and execution rules (e.g. order) for parsed entries. E.g. to implement different styles for anonymous and logged in users for XWiki.StyleSheetExtension parsed code (how Velocity can decide which is macro and whic is CSS id?): #if($isGuest) #xwikicontent { background-color: blue; } #else #xwikicontent { background-color: red; } #end Similarly, what should be right way to show alert for XWiki.JavaScriptExtension parsed code: alert($isGuest); Thanks! Valdis