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Developing a Web Site 355
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Use the checklist to test a Web site s accessibility Why might an individual need to increase a page s font size to view its content
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Accessibility Checklist
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Browse pages without images turned on Check for appropriate ALT text Turn the volume on the computer off Check that audio content is available through other sources such as a text equivalent Change the font size on the browser Verify the page is still usable with larger font sizes View the site at different screen resolutions or resize the browser window Verify that horizontal scrolling is not required Change the monitor s color display to grayscale or print out the Web page in grayscale or black and white Observe whether contrast of text, images, and other elements is adequate Navigate through the site with keyboard and Tab key Verify you can access all links and form elements
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If you have access to only a Web browser, you can use the checklist shown in Figure 1221 to test some of the standards and guidelines Ask your teacher for permission before testing the checklist items After you have completed the checklist, consider what problems you encountered If testing an outside site, what recommendations could you make to the site s owner about how to overcome accessibility obstacles How can you make your own sites more accessible
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Section 124 Assessment
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An accessible Web site is one that people with different needs and abilities can access and use Section 508 of the US Rehabilitation Act requires Federal agency Web sites to be accessible to all visitors, including those with disabilities Including alternative text is an important part of making a site accessible
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1 Define accessibility, accessibility standards, alternative text 2 Summarize What does it mean for a Web site to be accessible to all visitors 3 Explain Why is it important to include alternative text for a site s multimedia elements
Critical Thinking
4 Evaluate Why does the US government require all Federal agencies to create accessible Web sites 5 Analyze Accessibility You are creating a Web site that will contain images, video, and dynamic content What three things can you do to make your site more accessible to all users
Apply It!
Add Alternative Text Open the Hardware Devices Web site that you created in Unit 1 Add alternative text to the three images included in that site
12
Reading Review
SECTION 123 Web Site Privacy and Security Key Terms
privacy, 348 cookie, 348 privacy policy, 349 security, 351 data encryption, 351 Secure Socket Layer (SSL), 351 digital certificate, 352
SECTION 121 Examining an E-commerce Web Site Key Terms
cascading style sheets (CSS), 338 internal style sheet, 338 external style sheet, 339
Main Ideas
Many e-commerce sites mainly exist to provide an
Main Ideas
Many Web sites use cookies to gather and store
online presence for the company and to showcase that company s products You can use cascading style sheets to format an entire Web site There are two main types of style sheets: internal and external External style sheets make it easy to change a site s formatting
SECTION 122 Using Feedback Forms Key Terms
feedback form, 342 text area, 342 radio button, 344 check box, 344
information about their visitors A privacy policy describes the information the site gathers and the way the site owner will use it Security is the protection of data from unauthorized access, both on the Web server and during transmission over the Web Data encryption alters the appearance of information before transmission so that only the intended receiver with the proper decryption program can restore it to readable form Digital certificates confirm the validity of online businesses
SECTION 124 Web Site Accessibility Key Terms
accessibility, 353 accessibility standards, 353 alternative text, 354
Main Ideas
Web sites use feedback forms to gather information
from visitors Feedback forms enable visitors to communicate comments, questions, and suggestions to the site owner Forms provide various ways for visitors to respond, including text areas, text boxes, radio buttons, and check boxes Radio buttons allow visitors to choose only one of the options listed Check boxes allow visitors to select as many choices from the list as they desire
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