Java Reference
In-Depth Information
11
HTML Forms: Interacting
with the User
What You Will learn in this Chapter:
➤
Scripting text, password, text area, and hidden form controls
➤
Writing code for select, check box, and radio button form controls
➤
Using JavaScript to interact with new HTML5 form controls
Wrox.Com Code doWnloads for this Chapter
You can find the wrox.com code downloads for this chapter at
http://www.wiley.com/go/
BeginningJavaScript5E
on the Download Code tab. You can also view all of the examples
Web pages would be very boring if you could not interact with or obtain information
from the user, such as text, numbers, or dates. Luckily, with JavaScript this is possible.
You can use this information within the web page, or you can post it to the web
server where you can manipulate it and store it in a database if you wish. This chapter
concentrates on using the information within the web browser, which is called
client‐side
processing
.
You're quite accustomed to various user interface elements. For example, every operating
system has a number of standard elements, such as buttons you can click; lists, drop‐down
list boxes, and radio buttons you can select from; and boxes you can check. These elements
are the means by which you now interface with applications. The good news is that you can
include many of these types of elements in your web page—and even better, it's very easy to do
so. When you have such an element—say, a button—inside your page, you can then tie code to
its events. For example, when the button is clicked, you can fire off a JavaScript function you
created.
