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Joseph W. Lowery
"Dreamweaver CS3 Bible"
Remember, however, that graphics aren??™t the most effective communication method in every
circumstance. Luckily, the![]()
tag includes two attributes that enable you to describe your image using
plain text: alt and longdesc.
The alt attribute gives you a means to include a short description of a graphic. It is used in many ways:
n As a page is loading over the Web, the image is first displayed as an empty rectangle if the![]()
tag contains width and height information. Some browsers display the alt description in this
rectangle while the image is loading, offering the waiting user a written preview of the forthcoming
image.
NOTE NOTE
CAUTION CAUTION
NOTE NOTE
319
Inserting Images 9
n In many browsers, the alt text displays as a tooltip when the user??™s pointer passes over the
graphic.
n A real benefit of alt text is providing input for browsers that don??™t show graphics. Remember
that text-only browsers are still in use, and some users, interested only in content, turn off the
graphics to speed up the text display.
n The W3C is working toward standards for browsers for the visually impaired, and the alt text
can be used to describe the image.
For all these reasons, it??™s good coding practice to associate an alt description with all your graphics.
Pages:
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circumstance. Luckily, the
plain text: alt and longdesc.
The alt attribute gives you a means to include a short description of a graphic. It is used in many ways:
n As a page is loading over the Web, the image is first displayed as an empty rectangle if the
tag contains width and height information. Some browsers display the alt description in this
rectangle while the image is loading, offering the waiting user a written preview of the forthcoming
image.
NOTE NOTE
CAUTION CAUTION
NOTE NOTE
319
Inserting Images 9
n In many browsers, the alt text displays as a tooltip when the user??™s pointer passes over the
graphic.
n A real benefit of alt text is providing input for browsers that don??™t show graphics. Remember
that text-only browsers are still in use, and some users, interested only in content, turn off the
graphics to speed up the text display.
n The W3C is working toward standards for browsers for the visually impaired, and the alt text
can be used to describe the image.
For all these reasons, it??™s good coding practice to associate an alt description with all your graphics.
Pages:
634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658