JavaScript
JavaScript is the scripting language of the Web. JavaScript is used in millions of Web pages
to add functionality, validate forms, detect browsers, and much more. JavaScript is the
most popular scripting language on the Internet and works in all major browsers, such as
Internet Explorer, Firefox, Chrome, Opera, and Safari.
What You Should Already Know
Before you continue you should have a basic understanding of HTML.
What Is JavaScript?
JavaScript was designed to add interactivity to HTML pages.
JavaScript is a scripting language.
A scripting language is a lightweight programming language.
JavaScript is usually embedded directly into HTML pages.
JavaScript is an interpreted language (means that scripts execute without preliminary
compilation).
Everyone can use JavaScript without purchasing a license.
Are Java and JavaScript the Same?
No, they are not. Java and JavaScript are two completely different languages in both concept
and design.
Java (developed by Sun Microsystems) is a powerful and much more complex programming
language in the same category as C and C++.
What Can JavaScript Do?
1.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.
2.JavaScript can put dynamic text into an HTML page. A JavaScript statement
like document.write(“<h1>” + name + “</h1>”) can write a variable
text into an HTML page.
3.JavaScript can react to events. A JavaScript script can be set to execute when
something happens, like when a page has finished loading or when a user clicks
on an HTML element.
4.JavaScript can read and write HTML elements. A JavaScript script can read
and change the content of an HTML element.
5.JavaScript can be used to validate data. A JavaScript script can be used to
validate form data before it is submitted to a server. This saves the server from
extra processing.
6.JavaScript can be used to detect the visitor’s browser. A JavaScript script
can be used to detect the visitor’s browser, and depending on the browser, load
another page specifically designed for that browser.
7.JavaScript can be used to create cookies. A JavaScript script can be used to
store and retrieve information on the visitor’s computer.
JavaScript is the scripting language of the Web. JavaScript is used in millions of Web pages
to add functionality, validate forms, detect browsers, and much more. JavaScript is the
most popular scripting language on the Internet and works in all major browsers, such as
Internet Explorer, Firefox, Chrome, Opera, and Safari.
What You Should Already Know
Before you continue you should have a basic understanding of HTML.
What Is JavaScript?
JavaScript was designed to add interactivity to HTML pages.
JavaScript is a scripting language.
A scripting language is a lightweight programming language.
JavaScript is usually embedded directly into HTML pages.
JavaScript is an interpreted language (means that scripts execute without preliminary
compilation).
Everyone can use JavaScript without purchasing a license.
Are Java and JavaScript the Same?
No, they are not. Java and JavaScript are two completely different languages in both concept
and design.
Java (developed by Sun Microsystems) is a powerful and much more complex programming
language in the same category as C and C++.
What Can JavaScript Do?
1.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.
2.JavaScript can put dynamic text into an HTML page. A JavaScript statement
like document.write(“<h1>” + name + “</h1>”) can write a variable
text into an HTML page.
3.JavaScript can react to events. A JavaScript script can be set to execute when
something happens, like when a page has finished loading or when a user clicks
on an HTML element.
4.JavaScript can read and write HTML elements. A JavaScript script can read
and change the content of an HTML element.
5.JavaScript can be used to validate data. A JavaScript script can be used to
validate form data before it is submitted to a server. This saves the server from
extra processing.
6.JavaScript can be used to detect the visitor’s browser. A JavaScript script
can be used to detect the visitor’s browser, and depending on the browser, load
another page specifically designed for that browser.
7.JavaScript can be used to create cookies. A JavaScript script can be used to
store and retrieve information on the visitor’s computer.
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