Client-Side Scripting

INTRODUCTION OF CLIENT-SIDE SCRIPTING

What is client-side scripting?

• it is refers to computer programs on the web, that are executed at the client-side, by the user's web browser.

What client-side scripting can do?

• Form validation
• Display messages (eg: alert)
• Dynamically modify current document (eg: document interface)
• Animated images (eg: rollover, mouseover)

Introduction of JavaScript

• JavaScript is a client-side scripting
• Developed by Netscape
• You can write JavaScript in 2 ways :

1. Within the same file with your HTML file, OR

2. In external file with ".js" file extension.

What is JavaScript function?

• You can create function to perform specific task = user-defined function
• Function can be executed:
• Directly, OR
• Through evevnts
  

function helloWorld(){

alert(“Hello World!”);

}