1. Unit 1: Web Fundamentals
Lesson 5: HTML and Forms
August 20, 2013

2. Lesson 5: HTML and Forms
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Introduction
to HTML
Learning to
Use HTML
HTML and
Email
History and
Future of the
Web
HTML and
Forms
Search
Engine
Optimization
Learning to
Use CSS
Introduction
to CSS
Reusing
Code
3 Ways to
Use CSS
Separation of
Concerns
Launching
Your Own
Website
Lesson 1 Lesson 2 Lesson 3 Lesson 4
Lesson 8 Lesson 7 Lesson 6 Lesson 5
Lesson 9 Lesson 10 Lesson 11 Lesson 12
Build understanding Develop skills

3. Recap from last time (I)
• The World Wide Web was created by allowing webpages to link to
one another
• Tags such as <img>, <video>, and <audio> have enabled users to
view content
• Embedding allows users to view content without leaving a webpage
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A webpage A webpage embedded
within a webpage

4. Recap from last time (II)
• It’s not hard to embed content into your own HTML page
• Websites such as YouTube will often provide code for you to copy
and paste into your page
• In the future, websites will be able to invent their own tags!
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<iframe width="560" height="315" src=”http://www.youtube.com/embed/-
bayV3wez50" frameborder="0" allowfullscreen></iframe>
YouTube-provided HTML code

5. We’ve seen how to get information from a server
• Every time we visit a new website, we are asking a server to send us
the HTML files for that page
5
HAHAHA
Router
ISP
Facebook
server
Amazon
server
Youtube
server
DNS

6. What about sending information to a server?
• We actually do this all the time
• Any time you log in to an account, or fill out a survey, or even do a
Google search, you are sending information to a server
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7. We communicate with servers using forms
• Forms allow users to enter data that gets sent to a server for
processing
• Forms can contain:
• Checkboxes
• Radio buttons
• File attachments
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8. Forms make many things possible (I)
• Forms are often used for security
• Whenever you sign in to an account, the username and password
you enter is checked
• This way the website knows it’s you!
8
Amazon sign-in Gmail sign-in

9. Forms make many things possible (II)
• Forms are also used on all social websites
• All the content you see from your friends was entered using a form
9
Facebook post Twitter post

10. Forms make many things possible (III)
• Forms allow us to search for content on the internet
• A search bar is just a simple form!
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Google search Yahoo search

11. How is HTML used to create a form?
• We use HTML to tell the server what kind of data to expect
• In the below example, we expect users to input text into the Amazon
search bar
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The input type is text The rest of the code lets us control other options
Here’s how it looks

12. Let’s see another example
12
This time, the input
type is a radio button
More options
Here’s how it looks

13. What happens once the form is submitted?
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1. Let’s say you want to sign in to your Amazon account. After typing
your username and password, you click to submit the form.

14. Form submission (II)
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2. Your login information is sent to Amazon’s server, so they can
check to make sure it’s you
Amazon
server

15. Form submission (II)
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3. Then the server accesses the Amazon database, which is like a
filing cabinet where Amazon stores user information such as login
info, credit card numbers, and past purchases.
Amazon
server
Amazon
database

16. Form submission (II)
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4. The database tries to find your username and password
combination to check if it’s correct
Amazon
server
Amazon
database

17. Form submission (II)
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5. If the combination is correct, the server sends you the HTML files to
access your account. If not, you will be asked to log in again.
Amazon
server
Amazon
database

18. Summary (I)
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• HTML is important not just for receiving information, but also for
sending data to a server
• Forms allow us to actively engage with the internet, both sending
and receiving information as we browse websites
Amazon
server
Amazon
database

19. Summary (II)
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• There are many different types of forms – these allow for many
features such as account login and search bars
• User information is stored in databases, which are similar to filing
cabinets with a different file for each user
Google search Gmail sign-in

20. What to do on your own
1. Go to URL to complete the Codecademy course online
2. Do the practice set on the material learned
1. Take the follow-up quiz to test your understanding
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