Hi Chris,
It is possible to get the result that you want. In your plugin, create a struts action that renders some css based on the conditions you are checking. In your theme's /template/decorator/default/template.ftl put the following line in the head of the page (next to the system's identical "custom-css" line):
<style type="text/css"><@s.action name='your-plugin-css-action' executeResult='true' ignoreContextParams='true' /></style>
You might want to look at using freemarker from within /template/global/custom-css.ftl to check your conditions directly. Depending on what you're trying to do, you may be able to avoid having to create the struts action in the plugin.
-Jon
Swift Notion Software LLC
Expert Jive Customization
