The Book of JavaScript, 2nd Edition

Putting It All Together

Here's a script containing most of what's been presented in the chapter so far. The script in Figure 3-14 redirects users to one page if they're using an older version of Netscape (version 4 or earlier), another page if they're using an older version of Internet Explorer (version 5.5 or earlier), a third page for browsers it's unfamiliar with, and a fourth page for modern browsers it knows about.

I've broken the code into two blocks of <script> tags. The first sets up the variables and the second does the redirection.

Note

It's a good idea to declare variables at the top of your script. That way, if you want to change a variable later, you won't have to go hunting through a lot of HTML and JavaScript to find it.

Figure 3-14. Complete ...