Transcript Chapter 17 HTML, Scripting, and Interactivity

17
HTML, Scripting, and Interactivity
YOU WILL LEARN TO…
Section 17.1
• Add an audio file using HTML
• Create a form using HTML
• Add text boxes using HTML
• Add radio buttons and check boxes using HTML
• Add a pull-down menu using HTML
• Add a text area using HTML
• Modify a text box using CSS
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HTML, Scripting, and Interactivity
YOU WILL LEARN TO…
Section 17.2
• Identify client-side scripting languages
• Create a rollover button using JavaScript
• Identify server-side scripting languages
• Debug code
pp.
Section
17.1
Adding Interactivity Using HTML
Focus on Reading
Main Ideas
Key Terms
You can use HTML code
to insert multimedia
elements into a Web
page. Other HTML tags
allow you to create forms.
animated GIF
radio button
pull-down menu
text area
476-481
pp.
Section
17.1
476-481
Adding Interactivity Using HTML
Adding Multimedia Elements
Inserting an audio file or
an animated GIF file is
very similar to inserting an
image file.
animated GIF A sequence
of GIF images that are all
stored in a single file along
with an image transition
delay value that controls the
amount of time each image
will stay on the screen.
(p. 477)
pp.
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17.1
476-481
Adding Interactivity Using HTML
Creating a Registration Form
You create a registration
form in HTML with text
boxes, using preset
options, like radio
buttons, check boxes,
pull-down menus, and
text areas.
radio button An interactive
control that allows a user to
select only one option from a
list of options. (p. 478)
pull-down menu An interactive
element that looks like a text
field, but operates like a set of
radio buttons in that users can
choose only one item from a list
of options. (p. 479)
text area A form field that will
expand to allow visitors to enter
any length comment. (p. 479)
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Section
17.1
476-481
Adding Interactivity Using HTML
Forms in CSS
It is not difficult to create a form using HTML. Knowing
which HTML tags to use can help you adjust form
elements when you create a form in Dreamweaver.
pp.
Section
17.1
476-481
Adding Interactivity Using HTML
• Activity 17A – Add an Audio File Using HTML (p. 476)
• Activity 17B – Add Text Boxes Using HTML (p. 477)
• Activity 17C – Add Radio Buttons and Check Boxes Using
HTML (p. 478)
• Activity 17D – Add a Pull-down Menu Using HTML
(p. 479)
• Activity 17E – Add a Text Area using HTML (p. 480)
• Activity 17F – Use CSS to Style a Form (p. 480)
pp.
476-481
Section 17.1 Adding Interactivity Using HTML
Section Assessment
Identify In an animated
GIF, what does an
image transition delay
value control?
A. the size of each
image
B. the color of each
image
C. the amount of time
each image will stay
on the screen
D. the HTML tags used
to create each image
C. the amount of time
each image will stay
on the screen
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Section
17.2
483-486
Adding Interactivity Using Scripting
Focus on Reading
Main Ideas
Key Terms
Scripting languages are
used to supplement the
capabilities of standard
HTML. Scripting
languages are divided into
client-side scripts and
server-side scripts.
client-side script
object
event
event handler
function
variables
conditional statements
server-side script
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Section
17.2
483-486
Adding Interactivity Using Scripting
Client-Side Scripts
Some scripting
languages, known as
client-side scripts, are
designed to be transferred
to the user’s computer
along with the HTML
code.
client-side script A script
that is executed by the
user’s Web browser.
(p. 483)
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Section
17.2
483-486
Adding Interactivity Using Scripting
Client-Side Scripts
JavaScript is a popular
scripting language for
client-side scripts.
object In JavaScript, an
element in a browser window; it
can have properties that define
it. (p. 483)
JavaScript is composed of
several elements,
including:
event Anything that causes an
effect to occur; often triggered
by user action. (p. 484)
• Objects
• Events
• Event handlers
event handler The part of the
script that responds to an event
and defines the action that will
occur when the event takes
place. (p. 484)
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17.2
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Adding Interactivity Using Scripting
Client-Side Scripts
More JavaScript
elements:
• Functions
• Variables
• Conditional statements
function In JavaScript,
code that performs a
specific task or action.
(p. 484)
variables Used by scripts to
identify a value that will
change when the script is
executed. (p. 484)
conditional statement A
type of code that allows a
script to respond differently
depending on the action
taken by the user. (p. 484)
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17.2
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Adding Interactivity Using Scripting
Server-Side Scripts
Server-side scripts are
run from the Web server.
Web designers often use
CGI to create Web-based
forms that users fill out
and then submit to the
server.
server-side script A script
that is executed on the Web
server, with the output
transferred to the user’s
computer as a Web page.
(p. 485)
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17.2
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Adding Interactivity Using Scripting
Server-Side Scripts
Server-side scripts can be used to change static content
into dynamic content.
A server-side script can retrieve data based on the user’s
input and then generate a Web page that displays in the
user’s browser.
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Adding Interactivity Using Scripting
Debugging Code
An alert statement tells you when a particular action is not
occurring as specified.
Alert statements should be removed before the site is
published.
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Section
17.2
Adding Interactivity Using Scripting
• Activity 17G – Create a Rollover Button Using JavaScript
(p. 484)
483-486
pp.
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Section 17.2 Adding Interactivity Using Scripting
Section Assessment
True/False Client-side
scripts are executed on
the Web server.
False. Client-side
scripts are executed
by a user’s Web
browser.
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HTML, Scripting, and Interactivity
Chapter Review
Identify What element
looks like a text field,
but operates like a set
of radio buttons?
A. option button
B. entry field
C. text area
D. pull-down menu
D. pull-down menu
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HTML, Scripting, and Interactivity
Chapter Review
Explain What is the
difference between
client-side scripts and
server-side scripts?
Client-side scripts
are executed by the
user’s Web browser.
They are downloaded
to the user’s
computer with the
HTML code. Serverside scripts are
executed by the Web
server. They often
generate page
content based on the
input of the user.
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HTML, Scripting, and Interactivity
Resources
For more resources on this chapter, go to the Introduction
to Web Design Using Dreamweaver Web site at
WebDesignDW.glencoe.com.