: When people with outdated browsers visit your site, I think you would be better served by linking to an explanation of how to upgrade, rather than a diatribe about standards compliance. I would guess that people running Netscape 4.7, IE 5, or the like, fall into one of two categories. The first is people who don't understand the process of upgrading their browser. Probably the most effective approach to getting them to do it is explaining how, emphasizing that many sites will look better afterwords. The other category of people with old browsers are those who don't have direct control of what software is running on their machine. You can instruct them to what they might say, to request an upgrade from whoever maintains the computer they are using.