-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The first thing that comes to mind is IRC, simply because some browsers can be configured to call the user's favourite IRC client when encountering a URL beginning with irc://. If they are looking for a browser solution, one that uses only the browser and not a separate client, the only answer is some sort of client-side scripting like javascript or an applet opened by the browser, which as we know is not accessible to all browsers. HTH, Lorenzo - -- Living your life is a task so difficult, it has never been attempted before. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) iD8DBQFDRCxKG9IpekrhBfIRApFhAKCJ/2/dtDVd1lkPFvUs1AHqqJSMxACeOW7h vcm6f0dfPehGzo56YBw/MjQ= =4Lw4 -----END PGP SIGNATURE-----