Java is another language use in Internet. It is bit complicated than HTML. But you can do nice creative things with java.
webmaster website tools for hosting, web design, web development, graphics, & promotion of your websites which Include HTML, Java, Cliparts, Photos, Kay words analyzers, Links analyzers, Hit counters,Guestbooks, Forums, Links managers, Templates, Web hosting, site Enhancement, news letters
Html goodies
Here you can get some JavaScript. Try this site.

Htmlprimer
This site has good introduction to Java

dynamicdrive
Here you can find free DHTML scripts.

Etlux
Here you can find free JavaScript.

Javascriptkit
Here another place to JavaScript.