I suggest if you already download the jar file in you PC will be more easy to no have this problem about loading
Because i believe the way prof Hwang explain about loading applets especially size of applet 1.5 M reason to happened it.
And it take some time to loading completely in page, happened with me too when loading applet still appear black screen.
[quote] I have similar problem if I open too many tabs, or browser use too much memory/resources.
And the size of EJS created jar are about 1.5M for fully function code (user can create animated gif or do curve fitting... etc when you run jar file locally) so it also take time to wait for broswer to download full size code from our server.[/quote]
I believe this is the problem that meet every one happened with he it.