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Web Accessibility Principles
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Creating a fixed-width layout


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Web Accessibility Principles

with Zoe Gillenwater

Video: Creating a fixed-width layout

>> There are three basic types of CSS layouts that Dreamweaver CS3 offers as part of its pre-made layouts: fixed width, elastic width and liquid width. We're going to start out by looking at a fixed width layout. Fixed width means that the overall width of the design is constrained to a particular pixel width that the designer has chosen. Although this type of layout is the least optimal in terms of accessibility, as we'll go over in detail later, it's also the easiest type of layout to build. So it's a good place to start our practice with CSS layout.
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  1. 2m 0s
    1. Welcome
      1m 3s
    2. Using the exercise files
      57s
  2. 33m 15s
    1. What does accessibility mean?
      5m 51s
    2. How does accessibility help your users?
      3m 30s
    3. Experiencing a website via a screen reader
      5m 46s
    4. How does accessibility help you and your clients?
      3m 9s
    5. Overview of Section 508 standards
      5m 51s
    6. Overview of WCAG standards
      6m 4s
    7. Understanding consistency and semantic markup
      3m 4s
  3. 54m 31s
    1. Understanding screen readers and accessibility tools
      6m 12s
    2. Getting accessible browsers
      5m 41s
    3. Customizing Firefox for accessibility testing
      5m 53s
    4. Using custom accessibility toolbars
      5m 28s
    5. Using Fangs and the Color Contrast Analyzer
      5m 30s
    6. Accessibility tools to bookmark
      5m 53s
    7. Using automated accessibility checking tools
      4m 57s
    8. Setting up the JAWS screen reader on Windows
      6m 42s
    9. Using the VoiceOver screen reader on Mac OS X
      5m 52s
    10. Setting Dreamweaver accessibility preferences
      2m 23s
  4. 26m 12s
    1. Avoiding tables for layout
      3m 30s
    2. Using CSS for layout
      2m 40s
    3. Creating a fixed-width layout
      5m 51s
    4. Creating an elastic layout
      3m 51s
    5. Creating a liquid layout
      3m 4s
    6. Customizing a liquid layout
      7m 16s
  5. 1h 6m
    1. Specifying the language
      3m 43s
    2. Setting page titles
      2m 16s
    3. Setting headings and paragraphs
      9m 55s
    4. Styling headings
      9m 56s
    5. Hiding section headings from sighted users
      6m 41s
    6. Styling text for readability
      6m 41s
    7. Ensuring proper color contrast
      6m 36s
    8. Creating text emphasis
      4m 29s
    9. Indicating quotations
      4m 29s
    10. Creating basic lists
      4m 16s
    11. Styling lists
      7m 15s
  6. 1h 15m
    1. Using lists for navigation
      6m 45s
    2. Creating a horizontal navigation bar
      13m 25s
    3. Creating a vertical navigation bar
      11m 44s
    4. Adding skip navigation links
      12m 0s
    5. Hiding skip navigation links
      6m 17s
    6. Proper link text and title attributes
      6m 11s
    7. Opening new windows
      4m 28s
    8. Accessibility limitations of fly-out menus
      6m 30s
    9. Creating an accessible fly-out menu
      8m 38s
  7. 27m 55s
    1. Proper ALT text for navigation images
      4m 57s
    2. Proper ALT text for decorative images
      5m 19s
    3. Adding ALT text to an existing site
      6m 9s
    4. Adding ALT text to image maps
      5m 58s
    5. Describing complex graphics
      5m 32s
  8. 34m 1s
    1. Using tables for data
      3m 0s
    2. Creating header cells
      4m 5s
    3. Adding table captions and summaries
      9m 9s
    4. Styling tables
      5m 19s
    5. Applying header cells to complex tables
      6m 52s
    6. Adding id and headers attributes
      5m 36s
  9. 42m 7s
    1. Understanding form accessibility issues
      3m 7s
    2. Labeling form fields
      6m 9s
    3. Adding fieldsets and legends
      4m 42s
    4. Moving forms out of tables
      3m 44s
    5. Cleaning up a form's appearance
      4m 53s
    6. Aligning labels and fields using CSS
      9m 39s
    7. Indicating required fields
      6m 15s
    8. Dealing with CAPTCHA
      3m 38s
  10. 7m 29s
    1. The Text-Only technique
      3m 21s
    2. The Access Keys technique
      2m 35s
    3. The Tab Index technique
      1m 33s
  11. 18s
    1. Goodbye
      18s

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Web Accessibility Principles
6h 10m Appropriate for all Oct 16, 2007

Viewers: in countries Watching now:

Accessibility on the web has been an issue for over a decade, and it remains a crucial--but often overlooked--element of web design. Instructor Zoe Gillenwater explains the concept of accessibility as it applies to the web, and describes how it affects the audience. She also covers how to set up accessibility testing, and how to apply accessibility principles to new and existing sites using standards-compliant markup and CSS. Exercise files accompany the tutorials.

Topics include:
  • Understanding Flex programming languages
Subjects:
Web User Experience Accessibility
Author:
Zoe Gillenwater

Creating a fixed-width layout

>> There are three basic types of CSS layouts that Dreamweaver CS3 offers as part of its pre-made layouts: fixed width, elastic width and liquid width. We're going to start out by looking at a fixed width layout. Fixed width means that the overall width of the design is constrained to a particular pixel width that the designer has chosen. Although this type of layout is the least optimal in terms of accessibility, as we'll go over in detail later, it's also the easiest type of layout to build. So it's a good place to start our practice with CSS layout.

To create a new fixed width layout, go to the File menu, click on New, in the New Document dialogue box click on blank page in the left most column of the box. In the second column, select HTML. In the third column labeled Layout, choose the layout labeled Two column fixed left side bar header and footer. The image that appears in the fourth column gives you an idea of what this layout is going to look like.

The padlock icon on this image indicates that it's a fixed width layout. We next have to choose a document type for our page. We can choose between HTML 4.01 transitional and strict and various versions of XHTML. I'm going to choose HTML 4.01 Strict. Our next option is to choose where we want to add the CSS for the style. We can add it to the head of the page so that all of the rules will be listed out inside a style element in the head. We can add it to a file separate from the HTML page, which Dreamweaver will automatically attach to the page for you.

Or our third option is to link to an existing file, and we would only use this when we didn't want Dreamweaver to create any CSS but just create the structure of this page for us. Choose the Add to Head option. Even though on real sites it's best to keep all the styles in external style sheets, it's very helpful to keep the styles in the head while you're building the page for easy reference and not having to switch back and forth between multiple documents. Once you've finished editing the styles you can easily move them to an external style sheet. Now that we have all the settings correct, click on the Create button.

Dreamweaver creates a new page with placeholder content to help you visualize the page and how it's going to look. Each of the sections of the page is labeled with its purpose. The first DIV on the page is named header. The next DIV is named side bar one. The main content DIV is named, of course, main content. And if we scroll down to see the bottom of the page we can see our footer at the bottom. Let's preview this page in a browser so that we can see what a fixed width design looks and works like.

Go to the document tool bar and click on the globe icon to bring up the Preview in Browser menu. Select Preview in Firefox. We're prompted to save the page, so click Yes and save it to the Chapter 3 exercise folder. I'm going to name it fixed.html. Then click Save. Once it's saved you'll see the page in Firefox. Right now our browser window is maximized, but if I click the button to restore down its size, I can then resize the browser window to different widths and see how this affects the page.

So try making your browser window narrower and wider. The design stays centered, but it doesn't resize. Another thing that we can test is how the design will hold up when we change the text size. You can enlarge the text by holding down Ctrl and the plus key or Cmd and the plus key. Every time you hit that button combination the text will get bigger. To make the text smaller you can use the Ctrl and dash key or the Cmd and dash key.

Again, every time you hit these keys the text will get smaller. Once again, the width of the design did not change. The text reflowed, but the width stayed the same. Close the browser window now and go back to Dreamweaver. Let's look at the CSS that is making this page fixed in width. Open the CSS panel group and click on the CSS styles tab, then click the all button to reveal a list of all the styles in the document. You'll need to click the plus sign next to the style element. The second style listed is the one we want to look at.

I'm going to pull these other panels down so that we have more room to look at the CSS. All of the properties for this rule are shown in the CSS panel. You can see the width property is set and its value is set to 780 pixels. This is what is making the design fixed width. There's nothing in the markup that is doing it. If you wanted to customize one of Dreamweaver's fixed width layouts, this is where you would look to change the width. So it's pretty simple to create and customize a CSS layout in Dreamweaver CS3. But when we were looking at it in the browser we saw some accessibility problems.

The user cannot resize the design to make the text flow in a way that is easier for them to read. Another problem is that if a user has very large text, such as a vision impaired user, only a couple of words may fit on a line of text, which can make the flow of reading difficult. On the other hand, many people with dyslexia or tunnel vision would prefer a narrow design with shorter line length. But again, they are not able to resize the design to suit this. This doesn't mean that you should never use fixed width layouts. Remember, accessibility is a scale.

It's not an on or off characteristic. There are some types of sites that has content that are well suited to a fixed width layout, or it might be a requirement from your client. So if you feel you need to create a fixed width design, that's okay. Just be aware of its limitations. Next we'll look at a couple of layout types that are higher up on the accessibility scale.

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