[xwiki-users] mod_jk config ? mod_proxy ?

Hello, searching for mod_jk wasn't very rich on xwiki.org. I am convinced may are using an apache httpd in front of the jetty or tomcat hosting xwiki. Now the question comes as to whether some static paths are or should be configured. Currently we have none, on the back of mod_proxy, and I seem to see, e.g., the logo, that gets downloaded everytime which is big big non- sense. I understand all request to skins, yui, freemind, s5, tiny_mce, wiki_editor, xwiki.js, and yui could be directed to static requests (since server inclusions such as velocity files are read from the server anyways and the rest is static). Is that correct ? Is there any velocity within javascript ? And if yes where? thanks in advance paul