ie6-upgrade-warning - Google Code
http://code.google.com/p/ie6-upgrade-warning/

ie6でアクセスするとアラートを出すJS

いいなー

いいね

sage politely informin

he ie6-upgrade-warning is a little script (7.9kb) that displays a warning message politely informing the user to upgrade the browser to a newer version (links to newest IE, Firefox, Opera, Safari, Chrome are provided). The webpage is still visible behind a transparent background, but access to it is prevented. The idea is to force users to upgrade from IE6 and avoid the website from a bad reputation that website is not rendering correctly in IE6. The script is completely translatable in any language, very easy to set-up (one line of code in webpage and one parametter configuration).

Implement in TYPO3