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Javascript is a scripting language that will allow you to add real programming to your webpages.
You can create small application type processes with javascript, like a calculator or a primitive game of some sort.
However, there are more serious uses for javascript:
- 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.
- Cookies
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.
Before you start out with more complex javascripts you should understand the basics.
This tutorial covers all the core things you need to know before you can build and customize your own cool scripts.
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