It was terrible' It was just terrible' I'll never get over it as long as I live'

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It was terrible. It was just terrible. I'll
never get over it as long as I live.
http//www.imdb.com/title/tt0048960/

• Don Knotts in The Ghost and Mr. Chicken (1966)

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Computer Science 101Lecture 31
author.handalak.com/.../ images/javascript.jpg

• Fall Semester 2008
• Monday, April 4
• Week 12/18
• Albert H. Carlson

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Announcements

• Your CSS is due today, April 4
• HW 5 is due Friday, April 11
• The final is a mass final on Monday of Finals
  week, 7 9 pm in EP121

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The World Wide Web

• Program that allows you to view Web pages

• What is a Web browser?

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The World Wide Web

• What is a URL?

Unique address for a Web page A web server
delivers the Web page to your computer
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TCP/IP Again

• It has an address called the IP address in
  order to get packets to the right place
• Addresses are of the form
• XXX.XXX.XXX.XXX
• XXX can be any number from 0 255
• The address is normally assigned by the network
  you are on
• Dynamic address allocation is called DHCP

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The World Wide Web

• Built-in connection to another related Web page
  location

• What is a hyperlink (link)?

• Item found elsewhere on same Web page
• Different Web page at same Web site
• Web page at a different Web site

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3. DNS Returns IP Address
2. Request for IP Address from DNS Server
1. Put URL into Browser

• Form Request for
• page on PC

5. Send Request to Web Site Server
6. Server Loads Page and sends it back to you
7. Browser loads page
8. View Page
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OK, Get Me www.x...
Who has www.x...
Me! 4ms
Ok, I Choose
Me! 4.5ms
Me! 8ms
www.x...
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The World Wide Web

• Program used to find Web sites and Web pages by
  entering words or phrases called search text

• What is a search engine?

• Also called a keyword

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Good Search Engines

• Google
• Ask
• Dogpile
• CiteSeer (normally for science research)
• Lexis Nexis (LAS research)
• Google Scholar

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Ive Been Searching So Long

• Nesting using ()
• Binary Searches (Really more of a logical search)
• Uses the Binary Operators
• AND (Cat AND Siamese)
• OR (Cat OR Siamese)
• NOT (Cat NOT Siamese)
• Uses them in combination with key words

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The World Wide Web

• What graphics formats are used on the Web?

BMP
JPEG(pronounced JAY-peg)
PNG(pronounced ping)
GIF(pronounced JIFF)
PCX
TIFF
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The World Wide Web

• What is animation?

• Appearance of motion created bydisplaying a
  series of still imagesin sequence

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Questions?