Personnally that has always been the only one I have tested to be always working, appending the milliseconds, or any random value, has been working. it seems a difference of value of the variable in the URLstring is what makes browsers cache it or not. -- Perhaps if you control the output of your post you can create a header with nocache , but I wouldn't bet on all browser respecting the header, I prefer adding a random value, even if yes that's a bit more traffic for the server (including in the log files) Cordialement, __ Alliax ~CV : http://LingoParadise.com/cv.php Un site pour Toulon : http://ToulonParadise.com Un site pour Renaud : http://rfaucilhon.multimania.com Un site pour Director : http://LingoParadise.com