The Book of JavaScript, 2nd Edition

How the Book of JavaScript Tip Box Works

The Book of JavaScript website has a little textarea that shows various programming tips. The script keeps these tips in an array and then uses JavaScript to loop through the array, showing one tip at a time. Each tip stays in the textarea for 3.5 seconds before the next one appears. I should confess that I got the idea for this tip box from something that the search engine ask.com (http://www.ask.com, formerly known as Ask Jeeves) once had on its home page. In fact, I will present two different versions of the code. The first version, shown in Figure 8-13, is very similar to the code Ask.com originally used. The second version, which you'll see in Figure 8-14, is a bit simpler (though not necessarily better). ...