Academic Tutorials

English | French | Portugese | German | Italian
Home Advertise Payments Recommended Websites Interview Questions FAQs
News Source Codes E-Books Downloads Jobs Web Hosting

CSS 2.0
CSS 2.0 Introduction
CSS 2.0 Attaching Style
CSS 2.0 Applying Style
CSS 2.0 Key Concepts
CSS 2.0 Color Contents
CSS 2.0 Fonts Contents
CSS 2.0 Text
CSS 2.0 Lists
CSS 2.0 the box model
CSS 2.0 Advanced concepts
CSS 2.0 Positioning
CSS 2.0 Boxes
CSS 2.0 Generated content
CSS 2.0 Dynamic effects
CSS 2.0 Tables
CSS 2.0 Paged media
CSS 2.0 Font Face
CSS 2.0 Aural Style Sheets
CSS 2.0 Language styles

HTML Tutorials
HTML Tutorial
XHTML Tutorial
CSS Tutorial
TCP/IP Tutorial
CSS 1.0
CSS 2.0
XML Tutorials
XML Tutorial
XSL Tutorial
XSLT Tutorial
DTD Tutorial
Schema Tutorial
XForms Tutorial
XSL-FO Tutorial
XML DOM Tutorial
XLink Tutorial
XQuery Tutorial
XPath Tutorial
XPointer Tutorial
RDF Tutorial
SOAP Tutorial
WSDL Tutorial
RSS Tutorial
WAP Tutorial
Web Services Tutorial
Browser Scripting
JavaScript Tutorial
VBScript Tutorial
DHTML Tutorial
HTML DOM Tutorial
WMLScript Tutorial
E4X Tutorial
Server Scripting
ASP Tutorial
PERL Tutorial
SQL Tutorial
ADO Tutorial
Apple Script
PL/SQL Tutorial
SQL Server
.NET (dotnet)
.Net Mobile
C# : C Sharp
SVG Tutorial
Flash Tutorial
Media Tutorial
SMIL Tutorial
Photoshop Tutorial
Gimp Tutorial
Gnuplot Programming
GIF Animation Tutorial
Scientific Visualization Tutorial
Web Building
Web Browsers
Web Hosting
W3C Tutorial
Web Building
Web Quality
Web Semantic
Web Careers
Weblogic Tutorial
Web Site Hosting
Domain Name
Java Tutorials
Java Tutorial
JSP Tutorial
Servlets Tutorial
Struts Tutorial
EJB Tutorial
JMS Tutorial
JMX Tutorial
Programming Langauges
C Tutorial
C++ Tutorial
Visual Basic Tutorial
Data Structures Using C
Assembly Language
Forth Programming
Lisp Programming
Data Warehousing
CGI Programming
Emacs Tutorial
Soft Skills
Communication Skills
Time Management
Project Management
Team Work
Leadership Skills
Corporate Communication
Negotiation Skills
Database Tutorials
Operating System
Software Testing
SAP Module
Business Warehousing
SAP Basis
Material Management
Sales & Distribution
Human Resource
Customer Relationship Management
Production and Planning
Networking Programming
Corba Tutorial
Networking Tutorial
Microsoft Office
Microsoft Word
Microsoft Outlook
Microsoft PowerPoint
Microsoft Publisher
Microsoft Excel
Microsoft Front Page
Microsoft InfoPath
Microsoft Access
Financial Accounting
Managerial Accounting
Network Sites

CSS 2.0 tutorial - Key concepts

Previoushome Next

CSS2 tutorial - Key concepts



So that style sheets are as short as possible, many styles inherit. This means that if the value for an inherited property has not been specified, the parent's value (which might in turn have been inherited) is used. Thus if you specify BODY {color: black} then everything inside BODY will inherit that color unless a contrary declaration is made.

It is stated in this tutorial whether a property inherits, although generally it is a common sense matter and can usually be guessed.

There are dangers in relying on inheritance - it should not be assumed that supplying a style that is inherited to BODY will automatically give all elements that style. For example, if an element is inside X, which is also inside BODY, the styles that are applied to X override BODY's values, and so the element inherits X's styles over BODY's.

It is important to note that percentages do not inherit, but the calculated value does - e.g., if font-size: 50% results in a font size of 8px, 8px will be inherited, not 50%.

For example, given:

<STYLE type="text/css">
BODY {color: red}

the P element would be red because color inherits, and so in the absence of a declaration on the P element, the inherited value is used.

Conflict resolution

In essence, when you have conflicting styles applying to an element, the one specified via a class overrides normal ones. E.g., .class {color: red} overrides P {color: red}. In turn IDs override classes.

If, on the other hand, no declaration applies to an element, and the property is inherited, the inherited value is used. Otherwise, the initial value is used.

Thus if on a P element no declaration had been made for 'color' or 'height', then since 'color' is an inherited property, the value for 'color' for the P's parent would be used; on 'height', since 'height' is not an inherited property (as you could probably guess), the initial value, 'auto' is used.

The order sort

Rules at the end of the style sheet take precedence over those at the start. Inline style is assumed to be read after embedded style, which is read after linked style. Imported style sheets form the start of the importer's style sheet.


P {color: red}

P {color: green}

would result in green, much as you would expect.

CSS concepts

Case sensitivity

All CSS is case insensitive.


To specify that you don't want something to be treated as part of the style sheet, you enclose it in /* */.

P {color: red} /* This is a comment */


These are used to state the location of, for example, a background image or list picture.

They follow this syntax: url(filename.filetype), e.g. url(background.jpg) or url(

The file can optionally be enclosed in quotes - e.g. url("back.jpg").

Internet Explorer 3 will ignore URLs enclosed in quote marks. Netscape interprets URLs as relative to the HTML file, not to the style sheet. IE 3 does not support absolute urls (e.g.,


Relative lengths

Name Meaning Example
px A dot on the computer screen. Most screens have 800 pixels horizontally and 600 vertically. 7px
em One em is equal to the font size of the element, except when applied to font-size, where it is equal to the font size of the parent element. -4em
ex One ex is the x-height of a font. The x-height is usually about half the font-size, but in script fonts it can be as little as a quarter of it. Generally, browsers take 1ex to be half of the font-size, regardless of the font being used. 7ex
% A percentage of something 45.87%

Absolute lengths

Name Meaning Example
in Inch 7in
pt a point is 1/72 inches -5pt
pc 12 points 1.3pc
mm A millimeter 6.12mm
cm A centimeter 6.237cm

Lengths are used thus: P {font-size: 16px}.

You should avoid using absolute lengths, because the way they are rendered varies between browsers. The easiest thing is to specify sizes in pixels for fonts and line heights (although not the best: that is ems and %, but as explained in the bug guides this is fraught with difficulties) and % for everything else.

You should note that font-size: 7 in (or any similar declaration) is invalid, because there is a space between the number and the measurement.

Length bugs

Internet Explorer 3.* treats ems as points, meaning that using them on your page on font-size or line-height will make your page unreadable and will result in unexpected appearance otherwise. It treats exes as points, meaning that using them will make your page unreadable.


Some of the properties in the guide are designated as shorthands. This means that they set the values for all the properties indicated, and as such, will override inherited values even if the inherited value is not specifically overridden. If one or more of the values for a shorthand is not specifically stated, it is set to the initial value for that property. For example, font: 16px sans-serif is equivalent to:

font-size-adjust: none;
font-stretch: normal;
font-weight: normal;
font-style: normal;
font-variant: normal;
font-size: 16px;
line-height: normal;
font-family: sans-serif

because all unset values are reset to their initial values.

Be the first one to comment on this page.

  CSS 2.0 eBooks
More Links » »
 CSS 2.0 FAQs
More Links » »
 CSS 2.0 Interview Questions
More Links » »
 CSS 2.0 Articles

No CSS 2.0 Articles could be found as of now.

 CSS 2.0 News

No News on CSS 2.0 could be found as of now.

 CSS 2.0 Jobs

No CSS 2.0 Articles could be found as of now.

Share And Enjoy:These icons link to social bookmarking sites where readers can share and discover new web pages.
  • blinkbits
  • BlinkList
  • blogmarks
  • co.mments
  • connotea
  • digg
  • Fark
  • feedmelinks
  • Furl
  • LinkaGoGo
  • Ma.gnolia
  • NewsVine
  • Netvouz
  • RawSugar
  • Reddit
  • scuttle
  • Shadows
  • Simpy
  • Smarking
  • Spurl
  • TailRank
  • Wists
  • YahooMyWeb

Previoushome Next

Keywords: CSS2 tutorial - Key concepts, CSS2, css2, CSS2 tutorial, CSS2 tutorial pdf, history of CSS2, Custamizing Style Sheet, learn CSS2

HTML Quizzes
CSS Quiz
CSS 1.0 Quiz
CSS 2.0 Quiz
XML Quizzes
XML Quiz
XSL Quiz
DTD Quiz
Schema Quiz
XForms Quiz
XLink Quiz
XQuery Quiz
XPath Quiz
XPointer Quiz
RDF Quiz
RSS Quiz
WAP Quiz
Web Services Quiz
Browser Scripting Quizzes
JavaScript Quiz
VBScript Quiz
WMLScript Quiz
E4X Quiz
Server Scripting Quizzes
ASP Quiz
SQL Quiz
ADO Quiz
CVS Quiz
Python Quiz
Apple Script Quiz
SQL Server Quiz
PHP Quiz
.NET (dotnet) Quizzes
Microsoft.Net Quiz
ASP.Net Quiz
.Net Mobile Quiz
C# : C Sharp Quiz
VC++ Quiz
Multimedia Quizzes
SVG Quiz
Flash Quiz
Media Quiz
Photoshop Quiz
Gimp Quiz
Matlab Quiz
Gnuplot Programming Quiz
GIF Animation Quiz
Scientific Visualization Quiz
Graphics Quiz
Web Building Quizzes
Web Browsers Quiz
Web Hosting Quiz
W3C Quiz
Web Building Quiz
Web Quality Quiz
Web Semantic Quiz
Web Careers Quiz
Weblogic Quiz
SEO Quiz
Web Site Hosting Quiz
Domain Name Quiz
Java Quizzes
Java Quiz
JSP Quiz
Servlets Quiz
Struts Quiz
EJB Quiz
JMS Quiz
JMX Quiz
Eclipse Quiz
J2ME Quiz
Programming Langauges Quizzes
C Quiz
C++ Quiz
Visual Basic Quiz
Data Structures Using C Quiz
Cobol Quiz
Assembly Language Quiz
Mainframe Quiz
Forth Programming Quiz
Lisp Programming Quiz
Pascal Quiz
Delphi Quiz
Fortran Quiz
OOPs Quiz
Data Warehousing Quiz
CGI Programming Quiz
Emacs Quiz
Gnome Quiz
ILU Quiz
Soft Skills Quizzes
Communication Skills Quiz
Time Management Quiz
Project Management Quiz
Team Work Quiz
Leadership Skills Quiz
Corporate Communication Quiz
Negotiation Skills Quiz
Database Quizzes
Oracle Quiz
MySQL Quiz
Operating System Quizzes
BSD Quiz
Symbian Quiz
Unix Quiz
Internet Quiz
IP-Masquerading Quiz
IPC Quiz
Software Testing Quizzes
Testing Quiz
Firewalls Quiz
SAP Module Quizzes
ERP Quiz
Business Warehousing Quiz
SAP Basis Quiz
Material Management Quiz
Sales & Distribution Quiz
Human Resource Quiz
Netweaver Quiz
Customer Relationship Management Quiz
Production and Planning Quiz
Networking Programming Quizzes
Corba Quiz
Networking Quiz
Microsoft Office Quizzes
Microsoft Word Quiz
Microsoft Outlook Quiz
Microsoft PowerPoint Quiz
Microsoft Publisher Quiz
Microsoft Excel Quiz
Microsoft Front Page Quiz
Microsoft InfoPath Quiz
Microsoft Access Quiz
Accounting Quizzes
Financial Accounting Quiz
Managerial Accounting Quiz
Testimonials | Contact Us | Link to Us | Site Map
Copyright ? 2008. Academic All rights reserved Privacy Policies | About Us
Our Portals : Academic Tutorials | Best eBooksworld | Beyond Stats | City Details | Interview Questions | Discussions World | Excellent Mobiles | Free Bangalore | Give Me The Code | Gog Logo | Indian Free Ads | Jobs Assist | New Interview Questions | One Stop FAQs | One Stop GATE | One Stop GRE | One Stop IAS | One Stop MBA | One Stop SAP | One Stop Testing | Webhosting in India | Dedicated Server in India | Sirf Dosti | Source Codes World | Tasty Food | Tech Archive | Testing Interview Questions | Tests World | The Galz | Top Masala | Vyom | Vyom eBooks | Vyom International | Vyom Links | Vyoms | Vyom World | Important Websites
Copyright ? 2003-2024 Vyom Technosoft Pvt. Ltd., All Rights Reserved.