I've got a custom joomla component, along with a var will get/sets its value from/to $_cookie['timezone'] once i enable joomla cache, that var will stay with its old value and can't be transformed next, the var changes from the dropmenu [timezone], sets the worthiness to coockie['timezone'], and also the component will get it from that cookie, so again, once i enable caching in joomla (site performance problem) that var can't be set to a different value, and can't get its current value. any idea how do i fix that?, or possibly exclude that var in the cache in joomla, or dunno...

thanks.