Oracle 10 G DB Control : Changing Language in GUI

oracle db control is a webbased application for (advanced) configuration and
administration and tuning of a single oracle instance. changing the language of the webapp for is very simple - it has nothing to do with NLS_LANGUAGE settings. a reinstall or re-applying of a configuration via emctl or emca or dbca is not needed.
all to do is to change the language _clientside_ in the browser settings .)
this works immediate, even without a restart of the browser.