Wednesday 23rd of July 2008 10:42:36 PM 
top: 10%; bottom: auto; left: 50%; right: 10%; height: auto; min-width: 15em;

Here we have a case where the element should be 40% as wide as thecontaining block but can never be less than 15emwide. We've also changed the bottom andheight so that they're automaticallydetermined. This will let the element be as tall as necessary todisplay its content, no matter how narrow it gets (never less than15em, of course!).

We can turn this around to keep elements from getting too wide or

CSS Tutorials

CSS Tutorials

Welcome to the CSS Tutorials. In this section we cover Cascading Style Sheets, the powerful supplement to HTML that allows you complete control over the look of your websites. We'll show you how to create Cascading Style Sheets, and some of the cool tricks you can achieve with them.

For Beginners...

Introduction to CSS
This tutorial covers the basics: what are style sheets? How do I make a style sheet? It also shows some of the cool things you can do with style sheets.

CSS Units
A description of all the units that can be used with CSS, including lengths, percentages, colours and URL's.

For Intermediate Users...

Controlling Background Images and Colours
Learn how to use CSS properties to add background images and colour to your Web pages. Lots of neat tricks and examples are included!

Controlling Fonts with CSS
In this tutorial we take a look at how to control the fonts used in your page body text, using the various font properties that can be controlled with style sheets.

Controlling Text Appearance with CSS
This tutorial shows you how to control the layout of your text using the text properties available in CSS, such as line spacing and text alignment.

Making Lists Look Nicer with CSS
You can really go to town with HTML lists when you add a sprinkle of CSS! This tutorial shows you how to make your lists stand out from the crowd.

For Advanced Users...

CSS Positioning
This tutorial teaches you how to use CSS to position images, text, and other elements on your Web pages. Essential reading for anyone who wants to start using CSS for layout.




auto. This allows user agents to determine whatbehavior to use, although they are encouraged to provide a scrollingmechanism when necessary. This is a potentially useful way to useoverflow, since user agents could interpret it tomean "provide scrollbars only when needed." (They maynot, but they certainly could, and probably should.)

In the simplest case, the clipping region for any positioned elementis the content area of the element itself, as depicted in Figure 9-10. However, you may wish to change the clippingarea. That's what we'll do in the next section.