Fun and all, but if you'd want to do this without the website, would these things work in cmd or something? Or only in some coding program?
I prefer <a class="postlink" href="http://www.codeschool.com/" onclick="window.open(this.href);return false;">http://www.codeschool.com/</a>
For the client side stuff (HTML, CSS, Javascript/jQuery) you can simply make a file with the extension (.html .css .js), put your code in there and open the html file in your browser. It's when you need to do server side coding (PHP etc) you need a webserver.
Seems to be Javascript. Edit: Also contains tutorials for Python and Ruby. @Killvion: Python&Ruby provide interactive shells where you can try it, Javascript can be tested out in your browser, so can HTML&CSS.
Jup it's fun to learn, but I'm a little scared for when it gets to hard to follow easy parts at start