2. • Discuss the syntax in writing the
JavaScript in the HTML
documents.
• Apply the basic JavaScript
command in displaying text in an
HTML documents.
3. • It is an object-oriented, client
based scripting language
created by Netscape
programmer, Brendan Eich.
• What can you do using
JavaScript?
4. JavaScript syntax
<html> <html>
<head><title>JS<title> <head><title>JS<title>
</head> </head>
<script type= “text/javascript”> <script language= “Javascript”>
alert(“Welcome to the World alert(“Welcome to the World
of Dynamic Programming”); of Dynamic Programming”);
</script> </script>
<body> <body>
</body> </body>
</html> </html>
5. The <SCRIPT> and </SCRIPT> tags are the main way of
connecting JavaScript code to HTML. You are free to
embed as many scripts into a single HTML document as
you like using multiple <SCRIPT> tags.
Script tags What it does
<script language= “JavaScript> Tells your browser that JavaScript
code is about to appear
alert(“Welcome….”); -Statements
(object, properties, function, vari
ables , methods, and events.
-Semi colon terminates the
statements
</script> Tells the browser that the
JavaScript code is all done and it
can go back to HTML code
6. DISPLAYING TEXT
• <html>
• <body>
• <script type= “text/javascript”>
• document.write(“Welcome to the World of
Dynamic Web Programming!”)
• </script>
• Note: The word document.write is a standard JavaScript command
for displaying text/output in a page.
• The entire line document.write(“Welcome…!”) is called as
statements
• document is the object name and write is the property name.
• Notice that a dot (.) is used to separate the object name from a
property name. This is the syntax to access the property of an
object
7. SUMMARY
Writing/Scripting in JavaScript
JavaScript code is typically embedded in the
HTML, to be interpreted and run by the client's
browser. Here are some tips to remember when
writing JavaScript commands.
• JavaScript appears within the <Head> and <Body>
sections of an HTML document.
• JavaScript code is case sensitive
• White space between words and tabs are ignored
• Line breaks are ignored except within a statement
• JavaScript statements end with a semi- colon (;)
8. • A JavaScript code is a sequence of statements
that can be embedded into an HTML page and
executed directly by a Web browser to generate
dynamic HTML page.
• Scripting in JavaScript entails working with
objects, which you can create yourself or use
those built-in the language.
• You can access information(properties) about the
objects, perform actions(methods) on them and
responds(event handler) to the events that
happen to them.
• Objects, properties, methods, and event handlers
are the building blocks of JavaScript programs.
9. CompuQuiz/Exercises/Evaluation
1. Write the JavaScript Syntax.
2. What is the script tag tells the browser that a
JavaScript code is about to appear?
3. It what part or sections of the HTML documents
where script tags can be written?
4. What is the basic JavaScript code or command
for displaying text in you HTML documents?
5. What symbols it use to terminate a JavaScript
statements?
10. Assignment
1. Research on the following JavaScript
commands.
• Alert
• Confirm
2. What is the purpose of the alert and confirm
script commands in a web page?
