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JavaScript Tutorial

Introduction
How to Enable JavaScript
JavaScript Syntax
JavaScript Popup Boxes
JavaScript and HTML
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)
JavaScript Cookies
JavaScript Date and Time
JavaScript Arrays
Two Dimensional Arrays
JavaScript innerHTML
JavaScript Summary

JavaScript Reference

JavaScript Reserved Words
JavaScript Event Handlers
JavaScript Date and Time Functions

JavaScript Examples

List of Examples
JavaScript Dropdown Menu
JavaScript Print
JavaScript Alert Box
JavaScript Confirm
JavaScript Prompt
JavaScript Status Bar Messages
Image Rollovers
Popup Windows
JavaScript Redirect
Timed JavaScript Redirect
JavaScript Refresh Page

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JavaScript Confirm

The JavaScript confirm box gives your users a chance to confirm an action before JavaScript runs it. The 'confirm' box is created using JavaScript's built-in confirm() function. When the JavaScript confirm() function is triggered, a small box will pop up and display an "OK" button and a "Cancel" button (along with text that you specify in your JavaScript code).

Creating/Triggering a JavaScript Confirm

As mentioned, you create a JavaScript confirm box by calling the built-in JavaScript confirm() function. All you need to do is pass your message to this function.

Basic JavaScript Confirm

You can place the JavaScript confirm() function straight into an HTML tag. Like this:

<!-- JavaScript and HTML codes by Quackit.com -->
<input type="button" onclick="confirm('Did you really mean to click the button?');" value="Click me..." />

JavaScript 'confirm()' Within Another Function

The above example works, but it doesn't really do much. You could make your website more useful by including the confirm() function within another function.

Here's an example:

<!-- JavaScript and HTML codes by Quackit.com -->
<script language="javascript" type="text/javascript" >
function jumpto(selectedURL){
if (document.navForm.jumpmenu.value != "null")
	{
		var confirmLeave = confirm('Are you sure you want to leave the Quackit website?');
		if (confirmLeave==true)
		{
			document.location.href = selectedURL
		}
		else
		{
			return false;
		}
	}
}
</script>
<p>Visit one of these excellent websites:</p>
<form name="navForm">
<select name="jumpmenu" onChange="jumpto(document.navForm.jumpmenu.options[document.navForm.jumpmenu.options.selectedIndex].value)">
	<option>Jump to...</option>
	<option value="http://www.zappyhost.com">ZappyHost</option>
	<option value="http://www.code-generator.net">Code Generator</option>
	<option value="http://www.natural-environment.com">Natural Environment</option>
	<option value="http://www.great-workout.com">Great Workout</option>
</select>
</form>

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