What Can JavaScript do?
- JavaScript
gives HTML designers a programming tool - HTML authors are normally not
programmers, but JavaScript is a scripting language with a very simple
syntax! Almost anyone can put small "snippets" of code into
their HTML pages
- JavaScript
can react to events - A JavaScript can be set to execute when something
happens, like when a page has finished loading or when a user clicks on an
HTML element
- JavaScript
can read and write HTML elements - A JavaScript can read and change the
content of an HTML element
- JavaScript
can be used to validate data - A JavaScript can be used to validate form
data before it is submitted to a server. This saves the server from extra
processing
- JavaScript
can be used to detect the visitor's browser - A JavaScript can be used to
detect the visitor's browser, and - depending on the browser - load
another page specifically designed for that browser
- JavaScript
can be used to create cookies - A JavaScript can be used to store and
retrieve information on the visitor's computer