- Browser Detection
Detecting the browser used by a visitor at your page. Depending on the browser, another page specifically designed for that browser can then be loaded.
Storing information on the visitor's computer, then retrieving this information automatically next time the user visits your page. This technique is called "cookies".
- Control Browsers
Opening pages in customized windows, where you specify if the browser's buttons, menu line, status line or whatever should be present.
- Validate Forms
Validating inputs to fields before submitting a form.
An example would be validating the entered email address to see if it has an @ in it, since if not, it's not a valid address.
This tutorial covers all the core things you need to know before you can build and customize your own cool scripts.