I don't uderstand what it is you are asking for. Do you want help in making your own java for your site so you can connect to irc via that site and your just using the supplied URL as a reference as to how you want it or are you just trying to connect to irc via that java applet and are unable to. If you are trying to connect using that applet and are unable to then there is one of two probable issues, one being that the java site you are attempting to use is just messed up and not working correctly and two you need java enabled within your browser and/or the java plugin (java virtual machine).
