June 2013
Beginner
482 pages
11h 16m
English
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Chapter 15. Using JavaScript with web forms
After completing this chapter, you will be able to
Understand how to validate the input to a web form using JavaScript.
Work with radio buttons, select boxes, and check boxes, both to get their values and to set their state.
Provide feedback based on validation, both through an alert() dialog box and inline within the document.
Understand the limitations of JavaScript form validation, and see an example of validation gone wrong.
JavaScript and web forms
JavaScript has been used with web forms for a long time—typically, to quickly verify that a user has filled in form fields correctly before sending that form to the server, a process called client-side validation. Prior to JavaScript, a browser had to send ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.