JavaScript Popup Boxes

In JavaScript we can create three kinds of popup boxes: Alert box, Confirm box, and Prompt box.

Examples

Alert box

Alert box with line breaks

Confirm box

Prompt box

Alert Box

An alert box is often used if you want to make sure information comes through to the user.

When an alert box pops up, the user will have to click "OK" to proceed.

Syntax:

alert("sometext");

Confirm Box

A confirm box is often used if you want the user to verify or accept something.

When a confirm box pops up, the user will have to click either "OK" or "Cancel" to proceed.

If the user clicks "OK", the box returns true. If the user clicks "Cancel", the box returns false.

Syntax:

confirm("sometext");

Prompt Box

A prompt box is often used if you want the user to input a value before entering a page.

When a prompt box pops up, the user will have to click either "OK" or "Cancel" to proceed after entering an input value.

If the user clicks "OK" the box returns the input value. If the user clicks "Cancel" the box returns null.

Syntax:

prompt("sometext","defaultvalue");

Unlimited Disk and Transfer Hosting - New from Go Daddy!

Go Daddy Unlimited Hosting is the reliable, cost-effective choice for site owners who want superior speed and reliability. Available for Linux or Windows, our Unlimited Hosting accounts come with unlimited disk space and bandwidth, 1,000 email accounts, 50 MySQL Databases, a FREE SSL Certificate and over 50 FREE downloadable applications and utilities available through our exclusive Hosting Connections. Count on the world’s largest hostname provider to keep your site up and running—even when you’re not!

Take the uncertainty out of Web hosting and let GoDaddy.com put service, performance and value back in. No matter which hosting type or plan you choose, your site receives 24/7 maintenance and protection in our world-class data center.

Virtual Dedicated, Dedicated Server and unlimited plans also available.

Save 10% on web hosting - Enter code w3tenoff at checkout

Get Your Diploma! W3Schools' Online Certification Program is the perfect solution for busy professionals who need to balance work, family, and career building. The HTML Certificate is for developers who want to document their knowledge of HTML, XHTML, and CSS. The JavaScript Certificate is for developers who want to document their knowledge of JavaScript and the HTML DOM. The ASP Certificate is for developers who want to document their knowledge of ASP, SQL, and ADO.

Jump to: Top of Page or HOME or Printer friendly page

W3Schools provides material for training only. We do not warrant the correctness of its contents. The risk from using it lies entirely with the user. While using this site, you agree to have read and accepted our terms of use and privacy policy.

Copyright 1999-2008 by Refsnes Data. All Rights Reserved.

W3Schools was converted to XHTML in December 1999