What is JavaScript
What is JavaScript :
1.
JavaScript was design to add interctive to html
pages
2.
JavaScript is a scripting language
3.
A scripting language is a light wight
programming languange
4.
Javascript is usually embedded directely into
html pages
5.
Javascript is an interpreted languange(means
that scripts execuate with out preliminary compitation )
6.
Javascript work in all major browers such as IE
,FireFox,Chrome ect.,
7.
Javascript gives html designers a programming
tool
8.
Javascript can put dynimic text into an html
page
9.
Javascript can react to events
10.
Javascript can read and write html elements
11.
Javascript can be used to validate data in
client side
12.
The html <script> is used to insert a java
script into an html page.
J Scrip1.html
<html>
<body>
<script
type=”text/javascript”>
document.write(“<H1>java script example 1</h1>”);
document.write(“<H1>java script example 1</h1>”);
</script>
</body>
</html>
1. An external javascript file shoud be saved with extension of “.js”.
2. To include and external javascript file into
your document .
<script type=”text/javascript”
src=”myscript.js”>
</script>
3. Java script is casesensitive .
4. Single line comments in java
script: //
5. Double line/multi line comments in
java script: /* */
Example program :
Myscript.js
Document.write(“<h1>external
java Script exmple</h1>”);
Jscript1.html
<html>
<head>
<script type=”text/javascript”
src=” myscript.js”>
</script>
</head>
<body>
<h1>Indian Technologies</h1>
</body>
</hmtl>
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