To login you need to choose a nickname.
If you have no inspiration, you can also leave it like
After logging in, a pop-up "Java Security" will appear. Click on accept to allow the java-applet to run.
It is possible that a server goes down now and then.
If so, you can select just another server.
As the name implies, JavaIRC uses java. If java is blocked
by your browser, it is not possible to login on the
webchat. So don't forget your browser to give permission
to java for the use of the webchat.