After buying a very early issue of .net Magazine (1997?) that included the latest versions of both Internet Explorer (4.0?) and Netscape Navigator (4.0?) on a bonus CD, I wrote my very first lines of JavaScript. As far as I can remember, my script allowed a hyperlink to show/hide a block of text within the same page. The CD included many other DHTML examples, some of which needed separate code for the two browsers.
Recently, I've been using JavaScript to write something a little more complicated and I've been watching Douglas Crockford et al.'s JavaScript videos (JavaScript, The Theory of the DOM, Advanced JavaScript, Browser Wars, Quality, The Good Parts, The State of Ajax) to bring me up-to-date. JavaScript has changed alot: first-class functions, prototype-based inheritance, closures, variadic functions, etc. I have some catching up to do :-(