Web Design in a Nutshell, 3rd Edition

DOM Scripting in Action

To better appreciate the power of DOM Scripting, take a look at two relatively simple examples . Instead of breaking down the JavaScript into chunks, helpful JavaScript comments have been added that discuss what the script is doing at each step in the process. The reasoning for this is twofold: it lets you see the script as a whole and it gets you used to seeing comments in code (a habit which is worth picking up to ease long-term maintenance).