title: HTML, XHTML, and CSS, Sixth Edition
author:  Elizabeth Castro 
description: <b>Elizabeth Castro</b> has written all five best-selling editions of HTML for the World Wide Web: Visual QuickStart Guide. She is also author of Perl and CGI for the World Wide Web: Visual QuickStart Guide and XML for the World Wide Web: Visual QuickStart Guideboth best-sellers! Liz was the technical editor for Peachpits The Macintosh Bible, Fifth Edition, and she founded Pagina Uno, a publishing house in Barcelona, Spain.
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  ![cover_image](images/cover_fmt.jpg)
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  Table of Contents
  
  
  [Cover](9781118175248cover.xhtml)
  
  
  [Title page](9781118175248titlepage.xhtml)
  
  
  [Copyright](9781118175248copy.xhtml)
  
  
  [About the Authors](9781118175248f01.xhtml)
  
  
  [About the Technical Editor](9781118175248f02.xhtml)
  
  
  [MDSec: The Authors' Company](9781118175248f03.xhtml)
  
  
  [Credits](9781118175248f04.xhtml)
  
  
  [Acknowledgments](9781118175248f05.xhtml)
  
  
  [Introduction](9781118175248f06.xhtml)
  
  
  [Chapter 1: Web Application (In)security](9781118175248c01.xhtml)
  
  
  [The Evolution of Web Applications](9781118175248c01.xhtml#c01_level1_1)
  
  
  [Web Application Security](9781118175248c01.xhtml#c01_level1_2)
  
  
  [Summary](9781118175248c01.xhtml#c01_level1_3)
  
  
  [Chapter 2: Core Defense Mechanisms](9781118175248c02.xhtml)
  
  
  [Handling User Access](9781118175248c02.xhtml#c02_level1_1)
  
  
  [Handling User Input](9781118175248c02.xhtml#c02_level1_2)
  
  
  [Handling Attackers](9781118175248c02.xhtml#c02_level1_3)
  
  
  [Managing th