Regular expressions will do that. I am not good with regex, but i know that is trivial. You should be able to find a regex that solves that problem. You should be using the ereg() function of php. http://www.php.net/manual/function.ereg.php for more info. -----Mensaje original----- De: thelist-admin at lists.evolt.org [mailto:thelist-admin at lists.evolt.org]En nombre de Michael Barrett Enviado el: Wednesday, September 13, 2000 3:40 PM Para: thelist at lists.evolt.org Asunto: [thelist] Dumb PHP question. howdy howdy I have a dumb PHP quandry. I want to prevent users from entering anything but numbers (currency) into a form, commas and periods/ decimals are ok. here is the test URL http://flexitimecd.industryimagebank.com/demo/custom_cd.html thanks -- Michael -O^O- - --------------------------------------- For unsubscribe and other options, including the Tip Harvester and archive of TheList go to: http://lists.evolt.org Workers of the Web, evolt !