There is a feature in the microsoft virtual machine shipped with internet explorer called java logging (tools > internet options advanced) what this basicly does is write java System.out.println() , System.err.println etc output to a known location on the users harddisk namely %WINDIR%\java\javalog.txt Those who have been following HTTP-EQUIV's discovery will realise that this is extremely dangerous, as it will allow execution of arbitrary code However since this feature is disabled by default it can be considered to be very low risk -- jelmer