It is very hard to decide how much a Web developer needs to know to start using JavaScript. Some of you will be wondering why arithmetic, loops or objects have not been covered fully. For just tweaking Web pages what you have learned already may be enough (or too much for some).
This section finishes all you need to know to create simple, interative Web sites. The vital thing to do now is to use JavaScript on your pages. Practice XHTML and practice CSS by creating pages and then practice JavaScript by making those pages change. There is plenty of downloadable JavaScript out there so try borrowing some ideas. You may struggle to understand a lot of JavaScript which is written for technical correctness rather than understandability but just ignore them and look for easier scripts at first.
As you practice ask yourself whether your pages really need JavaScript at all. It slows down the browser and adds to the chances of the page not working on some browsers or operating systems. Can you do it with pseudo-classes or some of the techniques in the Intermediate CSS?
If you still want to continue with JavaScript get a good book or move on to the Intermediate JavaScript pages on this site.
