Java is loading slow or not working at all -- how can I fix it?

Hi there
I seem to be having problems using the Java on my iMac. When I and open Safari and go to a chat-room that I have went to for years
http://chat.parachat.com/chat/login.html
My Java takes so long to load. This time it took about 15 minuets to load into the chat-room. But other times, Safari has just become none-responsibe and I have had to "force quit" Safari.
Can someone just check this for me please and see if other people are having the same issue with their Safari and Java when they try to go in the chat-room. Also can someone please tell me how to solve this problem.
I have reset Java, reset Safari, deleted all the Caches and everything I can think of and I am still having the same problem. If it was on Windows I would just reinstall Java -- Can I do that on Mac (I don't know) and if I can how can I do it, or is there another way to solve the problem: Or is it just something I have to live with.
Thanks
Jason
PS:
Sorry about posting this here but I couldn't find a Java forum anywhere, so I thought this forum was the closest

Parachat must have made a fix. A few months ago, Parachat was almost unusable on my MacBook 13". Took very long to load in Safari, if at all.
Now, it runs very quickly on my new MacBook Air 11".
Our tech group asked Parachat to fix this. Now all is fine.
Is it working for anyone else now?
Your replies are appreciated!
Alan

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Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Please take this step regardless of the results of Step 1.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
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Java is loading slow or not working at all -- how can I fix it?

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