The PJIRC applet (version 2.1.1) I'm hosting on my site does a generic system beep whenever a user enters their message. It only happens to some people, not everyone, which is the confusing part. Why would this chat applet be making a beep sound for them? Any advice would be appreciated. I would like to make it not beep at all if possible, since that it's kind of an annoyance for most people.
Thanks a lot.