Sams Teach Yourself JavaScript in 24 Hours

Hour 18. Greasemonkey: Enhancing the Web with JavaScript

What You'll Learn in This Hour: How Greasemonkey and user scripts can enhance your web browser How to install and configure Greasemonkey in Firefox Installing and managing user scripts Creating your own user scripts Defining metadata for scripts Using the Greasemonkey API Adding macros to web forms

One of the recent trends is that JavaScript is being used in new ways, both inside and outside web browsers. In this hour, you'll look at Greasemonkey, a Firefox extension that enables you to write scripts to modify the appearance and behavior of sites you visit. User scripts can also work in Internet Explorer, Opera, and Safari with the right add-ons.