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Basic JavaScript

Introduction
How to Enable JavaScript
JavaScript Syntax
External JavaScript File
JavaScript Operators
JavaScript Variables
JavaScript Functions
JavaScript Events
JavaScript If Statements
JavaScript Switch Statements
JavaScript While Loop
JavaScript For Loop
JavaScript Try Catch
JavaScript Escape Characters
JavaScript Void(0)

Advanced JavaScript

JavaScript Cookies
JavaScript Date and Time
JavaScript Arrays
Two Dimensional Arrays
JavaScript Summary

JavaScript Reference

JavaScript Reserved Words
JavaScript Event Handlers
JavaScript Date and Time Functions

JavaScript Code Library

JavaScript Dropdown Menu
JavaScript Print
JavaScript Alert Box
JavaScript Status Bar Messages
Image Rollovers
Popup Windows
JavaScript Redirect
Timed JavaScript Redirect
JavaScript Refresh Page
Timed JavaScript Redirect

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JavaScript Alert Box

The JavaScript alert box is useful for alerting your users to something important. When a JavaScript alert box is triggered, a small box will pop up and display the text that you specify in your JavaScript code.

To create a JavaScript alert box, add the following within the <head> tags of your HTML document:


<script type="text/javascript">
alert('Enter your JavaScript alert box message here')
</script>

That's all the code you need to create a JavaScript alert box, however, you will need to decide when this alert box should appear.

You could put this code into a function and then call that function when a certain event occurs.

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