The Book of JavaScript, 2nd Edition

Navigator

The navigator object lets JavaScript know what type of web browser your visitor is using.

Properties

appName

FF, IE 3

Manufacturer of the browser (Netscape, Internet Explorer, Opera, and so on)

Example:

if (navigator.appName == "Netscape")
{
    window.location = "netscape_index.html";
}

This code sends a visitor to a page called netscape_index.html if the visitor is using Netscape.

appVersion

FF, IE 3

String representing the version of the browser. It's not useful unless interpreted with the parseFloat() function.

Example:

if (parseFloat(navigator.appVersion) < 2)
{
    alert("Isn't it time to upgrade?");
}

Less Common Properties

appCodeName	FF, IE 3	Read-only: Browser's code name
browserLanguage	IE 4	Read-only: Language in which the browser's interface is dis-played, ...