JS Example

There are three way to use of Java Script Example . that is

Use in body tag of html
Use in head tag of html
Use in external javaScript file .js

Syntax:

  <script>
    // JavaScript Code
</script>

1) Use in body tag Example

Display a alert dialog box.

Example:

<html>  
<body>  
<script type="text/javascript">  
 alert("Hello Friends");  
</script>  
</body>  
</html>  
 

Test it Now

2) Use in head tag Example

Create a function in JavaScript you need to onclick event to call msg() function..

Example:

  <html>  
<head>  
<script type="text/javascript">  
function msg(){  
 alert("Hello Friends.");  
  }  
</script>  
</head>  
<body>  
<p>Welcome to Friends</p>  
<form>  
<input type="button" value="click" onclick="msg()"/>  
</form>  
</body>  
</html>  
 

Test it Now

3) Use in external javaScript file (.js) Example

When we can write JavaScript code in other file having an extension .js and link the file inside the <head> tag of the HTML file.

Example

index.html

  <html>    
<head>    
    <script src="/p.js"></script>
</head>    
<body>    
<p>Welcome to Friends</p>    
<form>    
<input type="button" value="click" onclick="msg()"/>    
</form>    
</body>    
</html>   
 

p.js

 function msg(){    
 alert("Hello Friends.");    
  }    
 

Note: JS file is link to index.html file

Test it Now

Next TopicJS Comments

← prev next →

JS Tutorials

JS Example

1) Use in body tag Example

2) Use in head tag Example

3) Use in external javaScript file (.js) Example

Example