ProxyPass /images/ http://www.example.com/images/
ProxyPassReverse /images/ http://www.example.com/images/
ProxyPass /css/ http://www.example.com/css/
ProxyPassReverse /css/ http://www.example.com/css/
ProxyPass /icons/ http://www.example.com/icons/
ProxyPassReverse /icons/ http://www.example.com/icons/
ProxyPass /js/ http://www.example.com/js/
ProxyPassReverse /js/ http://www.exaple.com/js/

CacheRoot /var/cache/apache
CacheSize 25600
CacheEnable disk /images/
CacheEnable disk /js/
CacheEnable disk /css/
CacheDirLevels 5
CacheDirLength 3