A program like this existed for a while -- it was called (IIRC) the "Browser Upgrade Initiative" and was executed by the Web Standards Project <http://www.webstandards.org/>. Basically they encouraged webmasters to put in a hidden bit of text on their sites (that _would only_ be visible in non-css compliant browsers) that said something to the effect of "Your browser is missing a lot of formatting because it doesn't understand web standards. Hit this handy link <link to webstandards.org> for information on how to upgrade to a modern browser." Some die-hards set up their sites to do a straight redirect so that people using NN4 had no choice in the matter, and of course spammers found a way to abuse it :p . All in all though it was considered pretty successful, and was ended sometime in 2003. Steve On Tuesday, January 27, 2004, at 12:03 PM, Chris Hayes wrote: > AFAIK it's not just hat ppl _should_ be using updated browsers, they > really _must_, with the significant advances in security, encryption > and > cert handling wouldn't it be a public service to detect their browsers > and > tell 'em where to get updated? Just plain refuse to display them the > site?