Web Pages, Web Sites and ECommerce

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Chapter 6

• Web Pages, Web Sites and E-Commerce

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Section A

• Web Technology

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Terminology

• The Net
• Communications network
• The Web
• Connection of information over the internet
• Hypertext Transfer Protocol (HTTP)
• Hypertext Markup Language (HTML)
• Hypertext
• Hypertext link

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Hypertext
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Web Components

• Pages written in HTML
• Plain text (ASCII)
• HTTP communications

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Web Components
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HTML and XHTML

• HTML
• Tags specify how a document appears
• Attributes provide added detail
• World Wide Web Consortium (W3C)
• Reviews and revises the HTML standard
• XHTML is the follow-up to HTML 4

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Categories of HTML Tags

• Formatting tags
• Link tags
• Media tags
• Operational tags

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Web Browsers

• Uses HTTP to send messages to a Web Server
• Interprets HTML tags on how to display the
  document

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Popular Web Browsers

• Netscape
• Internet Explorer
• Opera
• Mozilla Firefox

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Web Page Elements

• Native file formats
• HTML, GIF, JPEG
• Helper applications
• Plug-in
• ltEMBEDgt
• Player

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Hypertext Transfer Protocol
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Hypertext Transfer Protocol

• Stateless protocol
• One request per session
• Many requests per page
• Web server must run HTTP software
• Web Sites and Web Servers

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Web Server Error Codes
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Cookies

• Small text file
• Used for
• Tracking path through web site
• Information for ad banners
• Personal information/settings
• Saved by web server to the computers hard drive

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Cookie Issues

• Safety
• Data, not instructions
• Security
• Contains only what you disclose on a web site
• Indexed with a random number
• Time Out
• Deletion of cookies
• Netscape and Internet Explorer

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Section B

• Basic Web Page Authoring

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Web Page Authoring

• Text editor
• HTML conversion tool
• Web authoring software
• Online web authoring

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Style

• Uniform formatting
• Cascading style sheet (CSS)
• Internal
• External

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Links

• Usually blue and underlined text
• Can be used with images
• Two parts
• Destination, Label

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Types of Links

• Internal
• External
• Intrapage
• Mailto

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HTML Forms
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HTML Forms

• Two steps
• Stores data in memory
• Data submitted to server
• Common Gateway Interface (CGI)
• Active Server Pages (ASP)
• Runs on server
• Can be written in multiple languages

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Tables and Forms

• Table
• Used primarily for layout of the page
• Frame
• Divides window into smaller windows

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Testing pages

• Test locally
• Test remotely
• Test links
• Update your site regularly

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Section C

• Web Page Extensions, Scripts and Programs

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DHTML and XML

• Dynamic HTML
• HTML plus other elements
• XML
• eXtensible Markup Language
• Tags, attributes
• Defines fields of data
• XSL
• eXtensible Stylesheet Language

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Scripting Languages

• Interpreted language
• VBScript
• JavaScript
• Adds interactivity for web pages
• Other languages
• Python
• PerlScript

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Scripting Languages

• Client-side
• Server-side
• Scripting Errors
• Syntax errors
• Script command not supported

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Java Applets
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Java Applets and ActiveX Controls

• Java Applets
• Bytecode
• ActiveX controls
• Compiled Program
• Security
• Digital certificate
• Certificate authority

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Section D

• E-Commerce

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Customer Types

• B2C (Business-to-consumer)
• C2C (Consumer-to-consumer)
• B2B (Business-to-consumer)
• B2G (Business-to-government)
• Shopping Carts
• Electronic Wallet

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Privacy and Security

• Spyware
• Ad-serving cookies